Inscription of first-order sapphire Bragg gratings using 400 nm femtosecond laser radiation
|
|
- Naomi Anderson
- 6 years ago
- Views:
Transcription
1 Inscription of first-order sapphire Bragg gratings using 400 nm femtosecond laser radiation Tino Elsmann, 1,* Tobias Habisreuther, 1 Albrecht Graf, 1 Manfred Rothhardt, 1 and Hartmut Bartelt 1,2 1 Institute of Photonic Technology, Albert-Einstein-Str. 9, Jena, Germany 2 Abbe Center of Photonics, Friedrich Schiller University, Max Wien Platz 1, Jena, Germany * tino.elsmann@ipht-jena.de Abstract: The paper describes the implementation of fiber Bragg gratings inscribed by femtosecond laser pulses with a wavelength of 400 nm. The use of a Talbot interferometer for the inscription process makes multiplexing practicable. We demonstrate the functionality of a threegrating multiplexing sensor and the temperature stability up to 1200 C for a single first-order Bragg grating Optical Society of America OCIS codes: ( ) Fiber Bragg gratings; ( ) Fiber optics sensors; ( ) Bragg reflectors. References and links 1. S. Bandyopadhyay, J. Canning, M. Stevenson, and K. Cook, Ultrahigh-temperature regenerated gratings in boron-codoped germanosilicate optical fiber using 193 nm, Opt. Lett. 33(16), (2008). 2. E. Lindner, C. Chojetzki, S. Brückner, M. Becker, M. Rothhardt, and H. Bartelt, Thermal regeneration of fiber Bragg gratings in photosensitive fibers, Opt. Express 17(15), (2009). 3. Y. Li, M. Yang, D. N. Wang, J. Lu, T. Sun, and K. T. V. Grattan, Fiber Bragg gratings with enhanced thermal stability by residual stress relaxation, Opt. Express 17(22), (2009). 4. D. Grobnic, S. Mihailov, C. Smelser, and H. Ding, Sapphire Fiber Bragg Grating Sensor Made Using Femtosecond Laser Radiation for Ultrahigh Temperature Applications, IEEE Photon. Technol. Lett. 16(11), (2004). 5. M. Busch, W. Ecke, I. Latka, D. Fischer, R. Willsch, and H. Bartelt, Inscription and characterization of Bragg gratings in single-crystal sapphire optical fibres for high-temperature sensor applications, Meas. Sci. Technol. 20(11), (2009). 6. T. Elsmann, E. Lindner, M. Becker, W. Ecke, M. Rothhardt, and H. Bartelt, Erzeugung von Faser-Bragg- Gittern (FBGs) in Saphirfasern für die Hochtemperatursensorik, in DGaO-proceeding, A28, (2011). 7. S. J. Mihailov, D. Grobnic, and C. W. Smelser, High-temperature multiparameter sensor based on sapphire fiber Bragg gratings, Opt. Lett. 35(16), (2010). 8. J. Wang, E. M. Lally, B. Dong, J. Gong, and A. Wang, Fabrication of a miniaturized thin-film temperature sensor on a sapphire fiber tip, IEEE Sens. J. 11(12), (2011). 9. A. Othonos, Fiber Bragg gratings, Rev. Sci. Instrum. 68(12), (1997). 10. B. Malo, K. O. Hill, F. Bilodeau, D. C. Johnson, and J. Albert, Point-by-point fabrication of micro-bragg gratings in photosensitive fibre using single excimer pulse refractive index modification techniques, Electron. Lett. 29(18), (1993). 11. K. O. Hill, B. Malo, F. Bilodeau, D. C. Johnson, and J. Albert, Bragg gratings fabricated in monomode photosensitive optical fiber by UVexposure through a phase mask, Appl. Phys. Lett. 62(10), 1035 (1993). 12. M. Becker, J. Bergmann, S. Brückner, M. Franke, E. Lindner, M. W. Rothhardt, and H. Bartelt, Fiber Bragg grating inscription combining DUV sub-picosecond laser pulses and two-beam interferometry, Opt. Express 16(23), (2008). 13. V. Phomsakha, R. S. F. Chang, and N. Djeu, Novel implementation of laser heated pedestal growth for the rapid drawing of sapphire fibers, Rev. Sci. Instrum. 65(12), (1994). 14. R. K. Nubling and J. A. Harrington, Optical properties of single-crystal sapphire fibers, Appl. Opt. 36(24), (1997) W. J. Tropf, M. E. Thomas, and T. J. Harris, Handbook of Optics (McGraw-Hill, 1995), Vol. 2, Chap Introduction Fiber Bragg gratings (FBGs) are sensor elements often used in harsh environments such as extreme temperatures, strong electromagnetic fields or chemically aggressive conditions, (C) 2013 OSA 25 February 2013 / Vol. 21, No. 4 / OPTICS EXPRESS 4591
2 because they are not influenced by electromagnetic radiation, have limited cross talk from many environmental influences and are very flexible. Due to their small size, they can easily be embedded in compound materials. Typical applications are temperature and strain sensing. There are limitations, however, for the use of such gratings in silica fibers for temperatures beyond 300 C or 1000 C. Fiber gratings based on color center effects bleach out at temperatures higher than 200 C 300 C. With additional heat treatment known as thermal regeneration it is possible to stabilize the gratings and, thus, expand the temperature range up to 1000 C [1,2] or, for short-term measurements, even up to 1200 C [3] near the glass transition point of fused silica. The softening of the silica glass then defines the ultimate temperature for which such sensors can be applied. There is, however, great interest to use such sensors for even higher temperatures, e.g. for temperature sensing and material monitoring in gas turbines or melting furnaces. Fibers made of single crystalline sapphire are a good option to overcome the temperature limit of fused silica, because the material melting point is at temperatures beyond 2040 C [4 6]. Single Bragg gratings in sapphire fibers have been reported for sensing applications up to 1745 C [4 7]. Thin film temperature sensors on a sapphire fiber tip have also been described [8]. Femtosecond (fs)-laser pulses were used for inscription of the FBGs, since they provide high peak intensities and multi-photon processes to provide a permanent change of the refractive index. FBGs are formed by a spatial periodic change of the refractive index achieved by special illumination techniques [9]. The most common techniques are point-by-point fabrication [10] and phase mask exposure [11]. For the point-by-point method, the inscription laser is focused into the fiber to change the refractive index locally and then the grating is built up by scanning the fiber. The phase mask technique uses the interference pattern directly located behind a phase mask, which is designed so that the interference pattern forms the whole grating structure. Another technique uses a phase mask as a beam-splitting element. The spatially separated beams are then superimposed to form an interference pattern with great geometrical flexibility. Such an interferometer of the Talbot type is used in our experiments [12]. Although the potential applicability of FBGs in sapphire fibers for high temperature sensing has been experimentally shown, the realization of the gratings still suffers from limitations. Until now, only the phase mask method has been applied successfully for the inscription of fiber Bragg gratings in sapphire fibers. The use of an interferometric inscription concept could simplify considerably the implementation of wavelength-multiplexed arrays of gratings. A second limitation in the inscription process is the wavelength used. From the simplified Bragg condition (Eq. (1)) for perpendicular incidence m λ Bragg = 2 n eff Λ grating (1) the Bragg wavelength λ Bragg depends on the effective refractive index n eff of the reflected mode, the order of diffraction m and the period of the phase grating Λ grating. Because sapphire has a very high refractive index of about 1.74, the grating period for a first-order grating with a λ Bragg of 1550 nm in the standard C-band has to be in the order of 440 nm. This is much smaller than the current inscription wavelength of 800 nm. To overcome this physical limitation, gratings of higher order [4 7] were inscribed e.g. for a doubled reflection wavelength (3100 nm) but used in second diffraction order for 1550 nm. In this case the reflection efficiency might be reduced especially in case of non-perfect grating structures. In the following we describe the implementation of multiplexed fiber Bragg gratings inscribed by an interferometric setup. We show that, by use of the second harmonic wave from a Titanium:Sapphire laser, we can inscribe fiber Bragg gratings also in first-order. This method is then easily applied to realize multiplexed arrays of gratings. (C) 2013 OSA 25 February 2013 / Vol. 21, No. 4 / OPTICS EXPRESS 4592
3 2. Inscription and characterization of the Bragg gratings For the inscription of FBGs we used a femtosecond laser system. This system provides pulses with a wavelength of 800 nm, a pulse duration of 135 fs and an averaged power of 3 W with a repetition rate of 1 khz. These pulses pass a nonlinear crystal to generate the second harmonic of the pump wave. The transformed pulses with a wavelength of 400 nm have an averaged power of 1 W. Femtosecond laser pulses were used for inscription of the FBGs, since they provide high peak intensities and multi-photon processes for a permanent change of the refractive index. We also tested the third harmonic with a resulting wavelength of 266 nm, but there was no power regime found that enabled a permanent change of the sapphires' refractive index without destroying the fiber. The averaged power for inscription with the second harmonic was reduced from the maximum of 1 W to 550 mw, and an external dynamic iris diaphragm was used to reduce the mean repetition rate in order to avoid a material ablation of the fiber due to local heating. We did not observe any erasing effect of the gratings due to the heating of the fiber during the inscription process itself [12]. The iris diaphragm was opened for 0.01 s with 0.5 Hz, so that on average a number of 20 pulses per second reached the fiber. Due to the shorter inscription wavelength, the averaged laser power was nearly halved, and a destruction of the fiber became less likely compared to an inscription wavelength of 800 nm. The FBG was fabricated using the interference pattern of a Talbot interferometer (see Fig. 1) [12]. Inside the interferometer the beam is divided by a phase mask. This phase mask has a period of 888 nm and was optimized for an inscription wavelength of λ inscription = 400 nm to suppress the zero order (which was additionally blocked). The two diffracted beams were reflected by the mirrors and then interfered under the angle ϑ. The fiber was placed exactly perpendicular to the interference pattern in the field of superposition. Additionally, a cylindrical lens (focal length of 221 mm) was used in front of the interferometer to increase the local intensity at the place of the fiber. Since the sapphire fibers were used as air-clad fibers with a large core diameter of 100 µm, the cylindrical lens was moved to scan through the full diameter with a velocity of 0.1 µm/s. Because of the very short pulses in the fsregime, all beam paths have to be aligned with a tolerance of less than 50 microns. Fig. 1. Talbot interferometer (schematic). For multiplexing of gratings the mirrors were turned symmetrically. This leads to a change in the angle ϑ. Considering the Bragg condition with respect to the interferometric inscription, the design wavelength can be calculated from the following Eq. (2): ( ) λbragg = n eff λinscription /sin ϑ. (2) Commercial single crystalline sapphire fibers (MicroMaterials Inc.) fabricated by laserheated pedestal growth to lengths up to one meter were used [13,14]. Attenuation data for Sapphire fibers vary from 0.5 to 4 db/m at 1550 nm, dependent on fiber diameter, (C) 2013 OSA 25 February 2013 / Vol. 21, No. 4 / OPTICS EXPRESS 4593
4 preparation, or annealing procedures [13, 14]. Sapphire fibers guide the light in a large multimode core with an index difference of 0.74 relative to air. Because of this fact, several hundred modes can propagate through the fiber, which results in a very broad reflection spectrum of the FBG of about more than 8 nm. To always measure the same form of the spectrum, the light of a superluminescent diode (SLD) was mode-mixed in a 50 µm graded index fiber and coupled via a commercial APC connector to the sapphire fiber (see Fig. 2). To suppress strong back reflection from the coupling, the sapphire fiber end was polished to an angle of 8 to match the APC fused silica fiber. We expected some losses especially for the coupling from 100µm sapphire to the 50µm supply fiber, but this setup achieved a well measurable signal output. The reflected light coming from the grating was then analyzed in a commercial Ibsen Photonics interrogator [15]. With this setup a spectral range from 1510 nm up to 1596 nm could be evaluated. 3. Experimental results Fig. 2. Spectral characterization setup (schematic). At first a fiber with a single grating was evaluated. Figure 3 shows the reflection spectrum at 100 C. A strong signal background is observed, belonging to the reflected light at the fiber end having the spectrum of the light source itself. Fig. 3. Characterization of a single FBG. Spectral response of the grating (black crosses) with a strong background signal (orange line), and the corrected reflection signal from the grating (green points), fit of a Gaussian function (blue line) and an asymmetric peak function (red dash-dotted line) to the corrected grating signal. (C) 2013 OSA 25 February 2013 / Vol. 21, No. 4 / OPTICS EXPRESS 4594
5 The real reflection peak was discernible as an offset coming from the grating. The background was subtracted to obtain the reflection spectrum of the grating itself. As the sapphire fiber is a multimode fiber, the reflected modes result in a wider peak compared to single mode fiber. The Bragg wavelength λ Bragg was derived as the center of a fitted Gaussian function. For the Bragg grating of Fig. 3, a reflection wavelength of λ Bragg = ( ± 0.072) nm was found to have a full width at half maximum (FWHM) of 9.44 nm. This would correspond to a numerical aperture of NA = 0.18 in accordance with observations in other experiments [5]. The reflectivity could not be estimated, because it was not possible to measure a reference intensity due to the connection losses of the sapphire fiber. However, the reflectivity is high enough for sensor applications, so that all of the inscribed gratings could be used in the heating experiments. The length of the grating itself is limited by the diameter of the inscription laser beam, which was 8 mm for a 1/e limit. Due to the multimodal reflection characteristic of the FBGs, an asymmetric Gaussian-like function [5] would describe the reflection spectrum better (red dash-dotted line in Fig. 3) than a Gaussian function. We heated up a grating to various temperatures between room temperature and 1200 C, stabilizing the temperature for at least 5 min before the spectra were measured. It turned out that the form of the grating spectrum is unaffected by a change of temperature. Therefore the temperature dependency of the Bragg wavelength showed almost the same parameters for the fitting using the Gaussian function, (25.7 ± 0.2) pm/k, and the asymmetric Gaussian function, (25.9 ± 0.2) pm/k. Since the resulting temperature dependencies were almost identical, we therefore used the Gaussian function for further experiments to evaluate the spectra, because of the simpler calculation procedure. The spectra of different gratings inscribed with the same parameters are reproducible with high accuracy. However, the amplitude and therefore the reflectivity strength may vary. This could be explained by the shape of the fiber itself, because single crystalline sapphire has a rounded hexagonal cross section. The orientation of the fiber was not adjusted in the experimental setup. For high temperature investigations, fibers were also heated up to 1200 C. The Fig. 4 shows the temperature dependency of the Bragg wavelength. The reflected intensity was constant during the whole heating process. This demonstrates that, with 400 nm fs-pulses, the material modifications induced in sapphire cause the gratings to be stable also at temperatures beyond 1000 C and that way to be applicable for measurements in high temperature regimes. The average temperature sensitivity for the fiber of Fig. 4 was (27.2 ± 0.4) pm/k. In Fig. 4, a slight deviation from a linear slope can be observed. The slope, and therefore the sensitivity, slightly increases monotonously with increasing temperature. Over the whole temperature range of 1200 K variation of +/ 2.9 pm/k can be found for the local slope of a linear fit. This behavior is already known and especially reported for sapphire fibers in reference [5]. To demonstrate the possibility of multiplexing and, hence, the main advantage of using a Talbot interferometer, three gratings with different wavelengths were inscribed one after another separated by ca. 1 cm. The wavelengths (1527 nm, 1549 nm and 1574 nm) were chosen in such a way that the three gratings had no spectral overlap during the subsequently heating in the furnace from 100 C up to 1000 C in 50 K steps. Figure 5 shows the grating signals at 100 C and 400 C. Due to the wavelength-dependent intensity of the SLD, the grating spectra were normalized to the SLD spectrum. The Bragg wavelength was determined by the center of the fitted Gaussian peak. The result is shown in Fig. 6. (C) 2013 OSA 25 February 2013 / Vol. 21, No. 4 / OPTICS EXPRESS 4595
6 Fig. 4. Temperature dependency of the Bragg wavelength for different peak identifications (crosses) and the fitted temperature sensitivity. Fig. 5. Spectra of an array with three gratings measured at 100 C (black line) and 400 C (red line). All three gratings showed a mostly linear dependency between temperature and Bragg wavelength with a slope of (28.7+/ 0.9) pm/k. The temperature dependence of the fiber Bragg wavelength is λ Bragg / T = λ Bragg (α Λ + α T ) with α Λ being the thermo-optic coefficient, which is α Λ = 12.6x10 6 /K [16] for 633 nm, and α T being the thermal expansion coefficient with α T = 7.15x10 6 /K [16]. The temperature dependence calculated from these numbers is 30.1 pm/k, so that there is a good agreement between the theoretical and the experimental value. For the fibers with the single grating we had observed a dependence of 25.7 ± 0.2) pm/k and of (27.2 ± 0.4) pm/k, using the same experimental setup under identical conditions. The differences may be related to structural changes from one fiber to the other. An imperfect crystallization process or crystal defects are possible reasons for these variations. Also for higher order gratings inscribed with 800 nm the temperature dependency varied between 25 pm/k and [4] and 28 pm/k [7] or even more [5] depending on the environmental temperature. (C) 2013 OSA 25 February 2013 / Vol. 21, No. 4 / OPTICS EXPRESS 4596
7 Fig. 6. Temperature dependency of multiplexed gratings. The initial Bragg wavelengths were 1527 nm (black boxes), 1549 nm (red circles) and 1574 nm (blue triangles). The grating with the highest reflection wavelength was only observable up to 500 C, because of the maximally possible evaluable wavelength determined by the light source and interrogator used. In general, the wide wavelength shift in case of extreme temperature variations results in some limitation for the number of possible multiplexed gratings within a certain spectral range. Within a temperature range of 1000 C, the Bragg wavelength shifts by nearly 30 nm. If the spectral separations of the gratings are about 10 nm (no cross talk between two different gratings), three gratings could be used within a spectral range of about 100 nm. The multiplexing capacity could be increased in case of a more restricted temperature measurement range. Further optimization concerning the number of multiplexed sensors would be possible by selective generation of only the fundamental fiber mode [7] or by a sapphire fiber structure with a smaller number of allowed propagating modes. 4. Conclusion We have demonstrated the applicability of femtosecond pulses with a wavelength of 400 nm to inscribe first-order FBGs in sapphire fibers. An external, additional, dynamic iris diaphragm was used to avoid heating up or destroying the fiber during the inscription process. Single gratings as well as three multiplexed gratings were fabricated using the Talbot interferometer. The gratings showed a nearly linear wavelength dependency of the maximum of reflection. Sapphire fibers are stable up to temperatures of 2000 C. The high temperature stability of the reported gratings has been experimentally tested for temperatures up to 1200 C. Acknowledgments Funding by the German Federal Ministry of Economics and Technology under contract 13INE036, and the Thuringian Ministry of Education, Science and Culture (EFRE program) is gratefully acknowledged. (C) 2013 OSA 25 February 2013 / Vol. 21, No. 4 / OPTICS EXPRESS 4597
First-order sapphire fiber Bragg gratings for high temperature sensing
First-order sapphire fiber Bragg gratings for high temperature sensing Tino Elsmann, Tobias Habisreuther, Albrecht Graf, Manfred Rothhardt, Markus A. Schmidt, Hartmut Bartelt, Leibniz-Institut für Photonische
More informationHigh-Temperature Strain Sensing Using Sapphire Fibers With Inscribed First-Order Bragg Gratings
High-Temperature Strain Sensing Using Sapphire Fibers With Inscribed First-Order Bragg Gratings Volume 8, Number 3, June 2016 T. Habisreuther T. Elsmann A. Graf M. A. Schmidt DOI: 10.1109/JPHOT.2016.2555580
More informationMicro-Structured Fiber Interferometer as Sensitive Temperature Sensor
Photonic Sensors (2013) Vol. 3, No. 3: 208 213 DOI: 10.1007/s13320-013-0116-5 Regular Photonic Sensors Micro-Structured Fiber Interferometer as Sensitive Temperature Sensor F. C. FAVERO *, M. BECKER, R.
More informationReview of Femtosecond Laser Fabricated Fiber Bragg Gratings for High Temperature Sensing
(2013) Vol. 3, No. 2: 97 101 DOI: 10.1007/s13320-012-0060-9 Review Review of Femtosecond Laser Fabricated Fiber Bragg Gratings for High Temperature Sensing C. R. LIAO and D. N. WANG Department of Electrical
More informationHigh-Efficiency Ultraviolet Inscription of Bragg Gratings in Microfibers
High-Efficiency Ultraviolet Inscription of Bragg Gratings in Microfibers Volume 4, Number 1, February 2012 Yang Ran Long Jin Yan-Nan Tan Li-Peng Sun Jie Li Bai-Ou Guan DOI: 10.1109/JPHOT.2011.2182187 1943-0655/$31.00
More informationFs- Using Ultrafast Lasers to Add New Functionality to Glass
An IMI Video Reproduction of Invited Lectures from the 17th University Glass Conference Fs- Using Ultrafast Lasers to Add New Functionality to Glass Denise M. Krol University of California, Davis 17th
More informationNegative-index gratings formed by femtosecond laser overexposure and thermal regeneration
www.nature.com/scientificreports OPEN recei e : 1 Octo er 201 accepte : 0 arc 2016 Pu is e : 16 arc 2016 Negative-index gratings formed by femtosecond laser overexposure and thermal regeneration Jun He
More informationSUPPLEMENTARY INFORMATION
Measuring subwavelength spatial coherence with plasmonic interferometry Drew Morrill, Dongfang Li, and Domenico Pacifici School of Engineering, Brown University, Providence, RI 02912, United States List
More informationCharacterisation of Fe-Ni amorphous thin films for possible magnetostrictive sensor applications
Characterisation of Fe-Ni amorphous thin films for possible magnetostrictive sensor applications Contents 9.1 Introduction 9.2 Experiment 9.3 Results and Discussions 9.4 Conclusion 9.1 Introduction Magnetostrictive
More informationFemtosecond micromachining in polymers
Femtosecond micromachining in polymers Prof. Dr Cleber R. Mendonca Daniel S. Corrêa Prakriti Tayalia Dr. Tobias Voss Dr. Tommaso Baldacchini Prof. Dr. Eric Mazur fs-micromachining focus laser beam inside
More informationThermal response of Bragg gratings in PMMA microstructured optical fibers
Thermal response of Bragg gratings in PMMA microstructured optical fibers Karen E Carroll 1*, Chi Zhang 1, David J. Webb 1, Kyriacos Kalli 2, Alexander Argyros 3, Maryanne C. J. Large 3 1 Photonics Research
More informationSuperstructure Fiber Bragg Grating based Sensors
ABHIYANTRIKI based Sensors An International Journal of Engineering & Technology (A Peer Reviewed & Indexed Journal) Vol. 3, No. 5 (May, 2016) http://www.aijet.in/ eissn: 2394-627X Ashima Sindhu Mohanty*
More informationIntroducing Jie Huang. Presentation to the Academy of Electrical and Computer Engineering, April 21, 2016
Introducing Jie Huang Presentation to the Academy of Electrical and Computer Engineering, April 21, 2016 Professional Background BS, Optical Engineering, Tianjin University, China, 2009 MS, ECE, Missouri
More informationHumidity Sensor Based on a Photonic Crystal Fiber Interferometer
Dublin Institute of Technology ARROW@DIT Articles School of Electrical and Electronic Engineering 2010-01-01 Humidity Sensor Based on a Photonic Crystal Fiber Interferometer Jinesh Mathew Dublin Institute
More informationHighly Sensitive Pressure Measurement based on Multimode Fiber Tip Fabry-Perot Cavity
Highly Sensitive Pressure Measurement based on Multimode Fiber Tip Fabry-Perot Cavity Wei Ping Chen* and Dongning Wang College of Optical and Electronic Technology, China Jiliang University, Hangzhou,
More informationFabrication of Micro and Nano Structures in Glass using Ultrafast Lasers
Fabrication of Micro and Nano Structures in Glass using Ultrafast Lasers Denise M. Krol University of California, Davis IMI Glass Workshop Washington DC April 15-17, 2007 Femtosecond laser modification
More informationMicro- and Nano-Technology... for Optics
Micro- and Nano-Technology...... for Optics 3.2 Lithography U.D. Zeitner Fraunhofer Institut für Angewandte Optik und Feinmechanik Jena Electron Beam Column electron gun beam on/of control magnetic deflection
More informationPATTERNING OF OXIDE THIN FILMS BY UV-LASER ABLATION
Journal of Optoelectronics and Advanced Materials Vol. 7, No. 3, June 2005, p. 1191-1195 Invited lecture PATTERNING OF OXIDE THIN FILMS BY UV-LASER ABLATION J. Ihlemann * Laser-Laboratorium Göttingen e.v.,
More informationExperimental Research on Multi-Wavelength FBG Fabrication Based on Multiple Exposure
PHOTONIC SENSORS / Vol. 5, No. 3, 2015: 273 277 Experimental Research on Multi-Wavelength FBG Fabrication Based on Multiple Exposure Jingsheng LV 1*, Xiaolei ZHANG 1, Haifeng QI 1, Jian Guo 1, Gangding
More informationFiber Bragg grating sensor based on external cavity laser
Dolores Calzadilla, V.M.; Pustakhod, D.; Leijtens, X.J.M.; Smit, M.K. Published in: Proceedings of the 20th Annual Symposium of the IEEE Photonics Benelux Chapter, 26-27 November 2015, Brussels, Belgium
More informationSeminar: Structural characterization of photonic crystals based on synthetic and natural opals. Olga Kavtreva. July 19, 2005
Seminar: Structural characterization of photonic crystals based on synthetic and natural opals Olga Kavtreva July 19, 2005 Abstract Novel class of dielectric structures with a refractive index which exhibits
More informationDETECTION OF LASER ULTRASONIC SURFACE DISPLACEMENT BY WIDE APERTURE FIBER OPTIC AMPLIFIER M.L. Rizzi and F. Corbani CESI, Milano, Italy
DETECTION OF LASER ULTRASONIC SURFACE DISPLACEMENT BY WIDE APERTURE FIBER OPTIC AMPLIFIER M.L. Rizzi and F. Corbani CESI, Milano, Italy Abstract: In the frame of the European Project INCA, CESI is in charge
More informationFabrication of micro/nano structures in glass by lasers
Lehigh University Lehigh Preserve International Workshop on Scientific Challenges for Glass Research Glass Conferences and Workshops Spring 4-1-2007 Fabrication of micro/nano structures in glass by lasers
More informationSelective laser melting of copper using ultrashort laser pulses
Lasers in Manufacturing Conference 2017 Selective laser melting of copper using ultrashort laser pulses Lisa Kaden a,*, Gabor Matthäus a, Tobias Ullsperger a, Andreas Tünnermann a,b, Stefan Nolte a,b a
More informationIntrinsic Fabry-Perot Interferometeric Sensor Based on Microfiber Created by Chemical Etching
Sensors 2014, 14, 16808-16815; doi:10.3390/s140916808 Article OPEN ACCESS sensors ISSN 1424-8220 www.mdpi.com/journal/sensors Intrinsic Fabry-Perot Interferometeric Sensor Based on Microfiber Created by
More information2.1 µm CW Raman Laser in GeO 2 Fiber
2.1 µm CW Raman Laser in GeO 2 Fiber B. A. Cumberland, S. V. Popov and J. R. Taylor Femtosecond Optics Group, Imperial College London, SW7 2AZ, United Kingdom O. I. Medvedkov, S. A. Vasiliev, E. M. Dianov
More informationSELECTION OF OPTICAL COMPONENTS FOR COMMON LASER TYPES
FEMTOSECOND LASER OPTICS SELECTED SPECIAL COMPONENTS METALLIC COATINGS FOR LASER AND ASTRONOMICAL APPLICATIONS 41 SELECTION OF OPTICAL COMPONENTS FOR COMMON LASER TYPES INTRODUCTION PRECISION OPTICS OPTICAL
More informationFiber Bragg Gratings. Research, Design, Fabrication, and Volume Production. All capabilities within one company
Your Optical Fiber Solutions Partner Fiber Bragg Gratings Research, Design, Fabrication, and Volume Production OFS Fiber and Cable Division All capabilities within one company OFS Specialty Photonics Division
More informationMiniaturized fiber taper reflective interferometer for high temperature measurement
Miniaturized fiber taper reflective interferometer for high temperature measurement Jun-long Kou, Jing Feng, Liang Ye, Fei Xu,* and Yan-qing Lu College of Engineering and Applied Sciences and National
More informationModification of Glass by FS Laser for Optical/Memory Applications
Modification of Glass by FS Laser for Optical/Memory Applications Kazuyuki Hirao and Kiyotaka Miura Department of Material Chemistry Kyoto University International Workshop on Scientific Challenges of
More informationOptical Fiber Gratings Written in Microstructured Optical Fibers
Optical Fiber Gratings Written in Microstructured Optical Fibers Yiping Wang Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen
More informationSingle-polarization ultra-large-mode-area Ybdoped photonic crystal fiber
Single-polarization ultra-large-mode-area Ybdoped photonic crystal fiber O. Schmidt, J. Rothhardt, T. Eidam, F. Röser, J. Limpert, A. Tünnermann Friedrich-Schiller University, Institute of Applied Physics,
More informationLow-cost, deterministic quasi-periodic photonic structures for light trapping in thin film silicon solar cells
Low-cost, deterministic quasi-periodic photonic structures for light trapping in thin film silicon solar cells The MIT Faculty has made this article openly available. Please share how this access benefits
More informationMechanical reliability of fiber Bragg gratings for strain or temperature sensor
Mechanical reliability of fiber Bragg gratings for strain or temperature sensor Hyuk-Jin Yoon, Sang-Oh Park, Chun-Gon Kim Smart Structures & Composites Laboratory, KAIST, Korea ABSTRACT Several factors
More informationStrain and Temperature Sensors Using Multimode Optical Fiber Bragg Gratings and Correlation Signal Processing
622 IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, VOL. 51, NO. 4, AUGUST 2002 Strain and Temperature Sensors Using Multimode Optical Fiber Bragg Gratings and Correlation Signal Processing Jirapong
More informationFiber Bragg Grating Strain Sensors for Marine Engineering
(2013) Vol. 3, No. 3: 267 271 DOI: 10.1007/s13320-013-0123-6 Regular Fiber Bragg Grating Strain Sensors for Marine Engineering Tingting WANG 1, Zilin YUAN 1*, Yuan GONG 1, Yu WU 1, Yunjiang RAO 1, Lili
More informationD-shaped fiber grating refractive index sensor induced by an ultrashort pulse laser
Research Article Vol. 55, No. 7 / March 1 2016 / Applied Optics 1525 D-shaped fiber grating refractive index sensor induced by an ultrashort pulse laser CHANGRUI LIAO, 1, QIAO WANG, 1, LEI XU, 2 SHEN LIU,
More informationNano-Patterning by Diffraction Mask-Projection Laser Ablation
Nano-Patterning by Diffraction Mask-Projection Laser Ablation Marisa MÄDER, Klaus ZIMMER, Rico BÖHME, Thomas HÖCHE, Jürgen W. GERLACH and Bernd RAUSCHENBACH Leibniz Institute of Surface Modification, Permoserstrasse
More informationThermal Behavior of Metal Embedded Fiber Bragg Grating Sensor
Thermal Behavior of Metal Embedded Fiber Bragg Grating Sensor Xiao Chun Li 1, Fritz Prinz 1, and John Seim 2 1. Rapid Prototyping Laboratory, Building 530 Room 226, Stanford University, Stanford, CA94305
More informationLong-term stability decay of standard and regenerated Bragg gratings tailored for high temperature operation
719 Long-term stability decay of standard and regenerated Bragg gratings tailored for high temperature operation F. K. Coradin 1,2, V. de Oliveira 1, M. Muller 1, H. J. Kalinowski 1, J. L. Fabris 1 1 Universidade
More information11.3 Polishing with Laser Radiation
196 E. Willenborg 11.3 Polishing with Laser Radiation Edgar Willenborg The surface roughness of a part or product strongly influences its properties and functions. Among these can be counted abrasion and
More informationEfficient multi-mode to single-mode conversion in a 61 port Photonic Lantern
Efficient multi-mode to single-mode conversion in a 61 port Photonic Lantern D. Noordegraaf* a,b, P. M. W. Skovgaard a, M. D. Maack a, J. Bland-Hawthorn c,d, R. Haynes d,e, and J. Lægsgaard b a NKT Photonics
More informationCHARACTERIZATION OF FIBER BRAGG GRATINGS WRITTEN IN LARGE MODE AREA FIBERS
U.P.B. Sci. Bull., Series A, Vol. 73, Iss. 4, 2011 ISSN 1223-7027 CHARACTERIZATION OF FIBER BRAGG GRATINGS WRITTEN IN LARGE MODE AREA FIBERS Ioana R. IVASCU 1, Regina GUMENYUK 2, Samuli KIVISTÖ 3, Oleg
More informationFemtosecond Laser-induced Crystallization of Amorphous Indium Tin Oxide Film on Glass Substrate for Patterning Applications
Femtosecond Laser-induced Crystallization of Amorphous Indium Tin Oxide Film on Glass Substrate for Patterning Applications Chung-Wei Cheng* 1, Yi-Ju Lee*, Wei-Chih Shen* 1, Jenq-Shyong Chen* and Chin-Wei
More informationMicro Patterning of Crystalline Structures on a-ito Films on Plastic Substrates Using Femtosecond Laser
Technical Communication JLMN-Journal of Laser Micro/Nanoengineering Vol. 4, No. 3, 2009 Micro Patterning of Crystalline Structures on a-ito Films on Plastic Substrates Using Femtosecond Laser Chung-Wei
More informationmicromachines ISSN X
Micromachines 2012, 3, 55-61; doi:10.3390/mi3010055 Article OPEN ACCESS micromachines ISSN 2072-666X www.mdpi.com/journal/micromachines Surface Plasmon Excitation and Localization by Metal-Coated Axicon
More informationCountry (UPV/EHU), Alda. Urquijo s/n, E Bilbao, Spain. P.O. Box , Orlando, Florida , USA
More info about this article: http://www.ndt.net/?id=20107 Assessment of a multi-core optical fibre interferometer for strain sensing in aerospace structures Oskar ARRIZABALAGA, 1,* Joel VILLATORO, 1,2
More informationExperiment 2b X-Ray Diffraction* Optical Diffraction Experiments
* Experiment 2b X-Ray Diffraction* Adapted from Teaching General Chemistry: A Materials Science Companion by A. B. Ellis et al.: ACS, Washington, DC (1993). Introduction Inorganic chemists, physicists,
More informationHighly-sensitive gas pressure sensor using twincore fiber based in-line Mach-Zehnder interferometer
Highly-sensitive gas pressure sensor using twincore fiber based in-line Mach-Zehnder interferometer Zhengyong Li, 1 Changrui Liao, 1 Yiping Wang, 1,* Lei Xu, 2 Dongning Wang, 3 Xiaopeng Dong, 4 Shen Liu,
More informationDeep-etched fused silica grating as a (de)multiplexer for DWDM application at the wavelength of 1.55µm
Deep-etched fused silica grating as a (de)multiplexer for DWDM application at the wavelength of 1.55µm Yanyan Zhang*, Changhe Zhou, Huayi Ru, Shunquan Wang Shanghai Institute of Optics and Fine Mechanics,
More informationThin Film Micro-Optics
Thin Film Micro-Optics New Frontiers of Spatio-Temporal Beam Shaping Ruediger Grunwald Max Born Institut for Nonlinear Optics and Short Pulse Spectroscopy Berlin, Germany ELSEVIER Amsterdam Boston Heidelberg
More informationPhotonics made in jena. Micro-Assembly and
Photonics made in jena Fraunhofer Institute for Applied Optics and Precision Engineering Micro-Assembly and System Integration 2 www.iof.fraunhofer.com Solutions with Light Expertise in Optical System
More information7-2E. Photonic crystals
7-2E. Photonic crystals Purdue Univ, Prof. Shalaev, http://cobweb.ecn.purdue.edu/~shalaev/ Univ Central Florida, CREOL, Prof Kik, http://sharepoint.optics.ucf.edu/kik/ose6938i/handouts/forms/allitems.aspx
More informationInternational Journal of Scientific & Engineering Research, Volume 6, Issue 2, February-2015 ISSN PHOTONIC CRYSTAL FIBER- AN OVERVIEW
45 PHOTONIC CRYSTAL FIBER- AN OVERVIEW Neha Mahnot1, Shikha Maheshwary2, Rekha Mehra3 1, 2, 3 Govt. Engg. College, Ajmer 2 shikhasm1992@gmail.com 1 neha29mahnot@gmail.com Abstract- This review paper gives
More informationMiniature fibre optic probe for minimally invasive photoacoustic sensing
Miniature fibre optic probe for minimally invasive photoacoustic sensing Sunish J. Mathews*, Edward Z. Zhang, Adrien E. Desjardins and Paul C. Beard Department of Medical Physics and Biomedical Engineering,
More informationNicolas Baudin travel grant - Internship in France proposal form
Nicolas Baudin travel grant - Internship in France proposal form * = mandatory fields SECTION 1 : Hosting institution in France Hosting institution in France* Name* University Paris Sud Univeristy Paris
More informationAssembling Ordered Nanorod Superstructures and Their Application as Microcavity Lasers
Supporting Information Assembling Ordered Nanorod Superstructures and Their Application as Microcavity Lasers Pai Liu 1, Shalini Singh 1, Yina Guo 2, Jian-Jun Wang 1, Hongxing Xu 3, Christophe Silien 4,
More information2006 Society of Photo Optical Instrumentation Engineers (SPIE)
S. Yliniemi, J. Albert, A. Laronche, Q. Wang, and S. Honkanen, Silver film ionexchanged Er doped waveguide lasers and photowritten waveguide gratings in phosphate glass, in Integrated Optics, Silicon Photonics,
More informationInterface quality and thermal stability of laser-deposited metal MgO multilayers
Interface quality and thermal stability of laser-deposited metal MgO multilayers Christian Fuhse, Hans-Ulrich Krebs, Satish Vitta, and Göran A. Johansson Metal MgO multilayers metal of Fe, Ni 80 Nb 20,
More informationInterferometric optical biosensor. Xingwei Wang
Interferometric optical biosensor Xingwei Wang 1 Light Transverse electromagnetic wave Reflection Refraction Diffraction Interference 2 Fabry-Perot interferometer 3 Interferometer Two waves that coincide
More informationHigh Pressure Chemical Vapor Deposition to make Multimaterial Optical Fibers
High Pressure Chemical Vapor Deposition to make Multimaterial Optical Fibers Subhasis Chaudhuri *1 1, 2, 3, John V. Badding 1 Department of Chemistry, Pennsylvania State University, University Park, PA
More informationCANUNDA. Application note. Version 06/10/2015
CANUNDA Application note Version 06/10/2015 2 TABLE OF CONTENTS INTRODUCTION LASER BEAM SHAPING SOLUTIONS APPLICATIONS Sheet cutting improved speed Hardened welding Pre-joining surface ablation Slow cooling
More informationChallenges and Future Directions of Laser Fuse Processing in Memory Repair
Challenges and Future Directions of Laser Fuse Processing in Memory Repair Bo Gu, * T. Coughlin, B. Maxwell, J. Griffiths, J. Lee, J. Cordingley, S. Johnson, E. Karagiannis, J. Ehrmann GSI Lumonics, Inc.
More informationModeling Of A Diffraction Grating Coupled Waveguide Based Biosensor For Microfluidic Applications Yixuan Wu* 1, Mark L. Adams 1 1
Modeling Of A Diffraction Grating Coupled Waveguide Based Biosensor For Microfluidic Applications Yixuan Wu* 1, Mark L. Adams 1 1 Auburn University *yzw0040@auburn.edu Abstract: A diffraction grating coupled
More informationBragg diffraction using a 100ps 17.5 kev x-ray backlighter and the Bragg Diffraction Imager
LLNL-CONF-436071 Bragg diffraction using a 100ps 17.5 kev x-ray backlighter and the Bragg Diffraction Imager B. R. Maddox, H. Park, J. Hawreliak, A. Comley, A. Elsholz, R. Van Maren, B. A. Remington, J.
More informationSolutions with Light. Energy and environment, Information and communication, Healthcare and medical technology, Safety and mobility.
Fraunhofer Institute for Applied Optics and Precision Engineering Solutions with Light EXPERTISE in Optical system technology 2 Solutions with Light The Fraunhofer IOF conducts application oriented research
More informationUltrasensitive Temperature Sensor Based on a Fiber Fabry Pérot Interferometer Created in a Mercury-Filled Silica Tube
Ultrasensitive Temperature Sensor Based on a Fiber Fabry Pérot Interferometer Created in a Mercury-Filled Silica Tube Volume 7, Number 6, December 2015 Kaiming Yang Jun He Ying Wang Shen Liu Changrui Liao
More informationEvolution of Optical Fiber Temperature during Fiber Bragg Grating Fabrication Using KrF Excimer Laser
Japanese Journal of Applied Physics Vol. 43, No., 24, pp. 47 5 #24 The Japan Society of Applied Physics Evolution of Optical Fiber Temperature during Fiber Bragg Grating Fabrication Using KrF Excimer Laser
More informationNanoscale changes with low temperature annealing inside composite optical fibres
Nanoscale changes with low temperature annealing inside composite optical fibres Wen Liu, 1,2 John Canning, 1,* Kevin Cook, 1 and Cicero Martelli 3 1 interdisciplinary Photonics Laboratories (ipl), School
More informationTime-resolved diffraction profiles and structural dynamics of Ni film under short laser pulse irradiation
IOP Publishing Journal of Physics: Conference Series 59 (2007) 11 15 doi:10.1088/1742-6596/59/1/003 Eighth International Conference on Laser Ablation Time-resolved diffraction profiles and structural dynamics
More informationQswitched lasers are gaining more interest because of their ability for various applications in remote sensing, environmental monitoring, micro
90 Qswitched lasers are gaining more interest because of their ability for various applications in remote sensing, environmental monitoring, micro machining, nonlinear frequency generation, laserinduced
More informationBiophotonics. Light Matter Interactions & Lasers. NPTEL Biophotonics 1
Biophotonics Light Matter Interactions & Lasers NPTEL Biophotonics 1 Overview In this lecture you will learn, Light matter interactions: absorption, emission, stimulated emission Lasers and some laser
More informationNanoscale Plasmonic Interferometers for Multi-Spectral, High-Throughput Biochemical Sensing
Supporting Online Information for Nanoscale Plasmonic Interferometers for Multi-Spectral, High-Throughput Biochemical Sensing Jing Feng (a), Vince S. Siu (a), Alec Roelke, Vihang Mehta, Steve Y. Rhieu,
More information(One) latest development(s)
1 (One) latest development(s) in photonic crystal fibres Philip Russell MAX PLANCK INSTITUTE for the science of light & Department of Physics Friedrich-Alexander-Universität Erlangen-Nuremberg FAU Alfried
More informationDeep-etched high-density fused-silica transmission gratings with high efficiency at a wavelength of 1550 nm
Deep-etched high-density fused-silica transmission gratings with high efficiency at a wavelength of 1550 nm Shunquan Wang, Changhe Zhou, Yanyan Zhang, and Huayi Ru We describe the design, fabrication,
More informationTrench Structure Improvement of Thermo-Optic Waveguides
International Journal of Applied Science and Engineering 2007. 5, 1: 1-5 Trench Structure Improvement of Thermo-Optic Waveguides Fang-Lin Chao * Chaoyang University of Technology, Wufong, Taichung County
More informationEXAMPLES OF INDUSTRIAL APPLICATIONS
14 EXAMPLES OF INDUSTRIAL APPLICATIONS STEEL FOIL Μ-DRILLING No melting Micron diameter Filters Functional surfaces DIAMOND CUTTING Low carbonization No HAZ Low material loss Diamond sheet cutting Chip
More informationEXAMPLES OF INDUSTRIAL APPLICATIONS
14 EXAMPLES OF INDUSTRIAL APPLICATIONS STEEL FOIL Μ-DRILLING No melting Micron diameter Filters Functional surfaces DIAMOND CUTTING Low carbonization No HAZ Low material loss Diamond sheet cutting Chip
More informationLow-Cost Fiber-Tip Fabry-Perot Interferometer and Its Application for Transverse Load Sensing
Progress In Electromagnetics Research Letters, Vol. 48, 103 108, 2014 Low-Cost Fiber-Tip Fabry-Perot Interferometer and Its Application for Transverse Load Sensing Xiaogang Jiang and Daru Chen * Abstract
More informationReceived: 28 September 2017; Accepted: 20 October 2017 ; Published: 26 October 2017
sensors Article Waveguide Bragg Gratings in Ormocer s for Temperature Sensing Maiko Girschikofsky 1, *, Manuel Rosenberger 1, Michael Förthner 2, Mathias Rommel 3 ID, Lothar Frey 2,3 and Ralf Hellmann
More informationUltrafast laser microwelding for transparent and heterogeneous materials
SPIE Commercial and Biomedical Applications of Ultrafast Lasers VIII, Conference 6881, 20-23 January 2008 San Jose Convention Center, San Jose, CA Ultrafast laser microwelding for transparent and heterogeneous
More informationTitle: Localized surface plasmon resonance of metal nanodot and nanowire arrays studied by far-field and near-field optical microscopy
Contract Number: AOARD-06-4074 Principal Investigator: Heh-Nan Lin Address: Department of Materials Science and Engineering, National Tsing Hua University, 101, Sec. 2, Kuang Fu Rd., Hsinchu 30013, Taiwan
More informationFemtosecond Laser Materials Processing. B. C. Stuart P. S. Banks M. D. Perry
UCRL-JC-126901 Rev 2 PREPRINT Femtosecond Laser Materials Processing B. C. Stuart P. S. Banks M. D. Perry This paper was prepared for submittal to the Manufacturing '98 Chicago, IL September 9-16, 1998
More informationQUASI-SIMULTANEOUS LASER WELDING OF PLASTICS COMPARISON OF DIODE LASER WELDING AND FIBER LASER WELDING
QUASI-SIMULTANEOUS LASER WELDING OF PLASTICS COMPARISON OF DIODE LASER WELDING AND FIBER LASER WELDING S. Ruotsalainen 1, P. Laakso 1 1 Lappeenranta University of Technology, Lappeenranta, Finland 2 VTT
More informationProceedings of Meetings on Acoustics
Proceedings of Meetings on Acoustics Volume 19, 2013 http://acousticalsociety.org/ ICA 2013 Montreal Montreal, Canada 2-7 June 2013 Underwater Acoustics Session 3aUWa: Acoustic Sensing Via Fiber Optics
More informationHigh Power Operation of Cryogenic Yb:YAG. K. F. Wall, B. Pati, and P. F. Moulton Photonics West 2007 San Jose, CA January 23, 2007
High Power Operation of Cryogenic Yb:YAG K. F. Wall, B. Pati, and P. F. Moulton Photonics West 2007 San Jose, CA January 23, 2007 Outline Early work on cryogenic lasers MPS laser technology Recent program
More informationTable 1. Chemical and Structural Properties. About 1095 C g/cm 3 1.2W/m/K( c); 1.6W/m/K(//c)
CASTECH R NLO Crystals Beta-Barium Borate (β-bab 2 O 4 or BBO) Introduction Beta-Barium Borate (β-bab 2 O 4 or BBO), discovered and developed by FIRSM, CAS (Fujian Institute of Research on the Structure
More informationHeat-fraction-limited CW Yb:YAG cryogenic solid-state laser with 100% photon slope efficiency
Heat-fraction-limited CW Yb:YAG cryogenic solid-state laser with 100% photon slope efficiency David C. Brown*, Thomas M. Bruno, and Joseph M. Singley Snake Creek Lasers, LLC, Hallstead, PA, 18822, USA
More informationDesign Optimization of Structural Parameters for Highly Sensitive Photonic Crystal Label-Free Biosensors
Sensors 2013, 13, 3232-3241; doi:10.3390/s130303232 Article OPEN ACCESS sensors ISSN 1424-8220 www.mdpi.com/journal/sensors Design Optimization of Structural Parameters for Highly Sensitive Photonic Crystal
More informationHigh peak power Erbium-Ytterbium MOPFA for coherent Lidar anemometry
High peak power Erbium-Ytterbium MOPFA for coherent Lidar anemometry G. Canat, L. Lombard, A. Dolfi-Bouteyre, C. Planchat, A. Durecu, M. Valla ONERA, France S. Jetschke, S. Unger, J. Kirchhof, IPHT Jena,
More informationSummary and scope for future study
Summary and scope for future study Abstract This chapter concludes the thesis by summarizing the results and presenting suggestions on further work based on this research. This research work focused on
More informationFabrication of the Crystalline ITO Pattern by Picosecond Laser with a Diffractive Optical Element
Fabrication of the Crystalline ITO Pattern by Picosecond Laser with a Diffractive Optical Element C.W. Chien and C.W. Cheng* ITRI South Campus, Industrial Technology Research Institute, No. 8, Gongyan
More informationNONTRADITIONAL MANUFACTURING PROCESSES
NONTRADITIONAL MANUFACTURING PROCESSES Lasers & Laser Beam Machining Basic NTM Process Groups: * Thermal NTM Processes - Laser Beam Machining (LBM) - Electron Beam Machining (EBM) - Plasma Arc Machining
More informationShort Length High Gain ASE Fiber Laser at 1.54µm by High Co-doped Erbium and Ytterbium Phosphate Laser Glasses
Short Length High Gain ASE Fiber Laser at 1.54µm by High Co-doped Erbium and Ytterbium Phosphate Laser Glasses Ruikun Wu, John D. Myers, TaoLue Chen, Michael J. Myers, Christopher R. Hardy, John K. Driver
More informationSingle crystal X-ray diffraction. Zsolt Kovács
Single crystal X-ray diffraction Zsolt Kovács based on the Hungarian version of the Laue lab description which was written by Levente Balogh, Jenő Gubicza and Lehel Zsoldos INTRODUCTION X-ray diffraction
More informationProduction and analysis of optical gratings and nanostructures created by laser based methods
Summary of the Ph.D. thesis Production and analysis of optical gratings and nanostructures created by laser based methods Kiss Bálint Supervisor: Dr. Vass Csaba Research fellow Doctoral School in Physics
More information2-D Array Wavelength Demultiplexing by Hybrid Waveguide and Free-Space Optics
2-D Array Wavelength Demultiplexing by Hybrid Waveguide and Free-Space Optics Trevor K. Chan, Maxim Abashin and Joseph E. Ford UCSD Jacobs School of Engineering Photonics Systems Integration Lab: PSI-Lab
More informationABSTRACT 1. INTRODUCTION
3 kw single stage all-fiber Yb-doped single-mode fiber laser for highly reflective and highly thermal conductive materials processing S. Ikoma, H. K. Nguyen, M. Kashiwagi, K. Uchiyama, K. Shima, and D.
More informationLaser Processing and Characterisation of 3D Diamond Detectors
Laser Processing and Characterisation of 3D Diamond Detectors ADAMAS GSI meeting 3rd Dec 2015 Steven Murphy University of Manchester 3D Diamond Group / RD42 Outline Laser setup for fabricating graphitic
More informationAutomation for the manufacturing of fiber Bragg grating arrays enables new applications
Invited Paper Automation for the manufacturing of fiber Bragg grating arrays enables new applications P. Lefebvre, A. Vincelette, C. Beaulieu, P. Ficocelli * LxSix Photonics Inc., 52 McCaffrey, Montreal,
More information