Innovative Fiber Optics Every Step of the Way

Transcription

1 Innovative Fiber Optics Every Step of the Way

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3 05 A full range of services for your needs 06 Optran UV, Optran WF Silica / silica fiber with optional buffers 07 Optran Plus UV, Optran Plus WF High NA pure silica / silica core fiber 08 Optran Ultra WFGE Ge-doped silica / silica fiber 09 Optran HUV, Optran HWF Silica fiber with hard polymer cladding 10 Optran PUV, Optran PWF Silica fiber with silicone cladding 11 Optran MIR Silver halide fiber 12 Optran NCC UV, Optran NCC WF Silica / silica non-circular core fiber 13 Optran NCF UV, Optran NCF WF Silica / silica non-circular fiber 14 Optube CT, Optube CTH Flexible Silica Capillary Tubing 15 Fiber optic Feedthroughs Pressure and Vacuum Feedthroughs 16 Comparison of attenuation values 17 Fiber cables 18 Fiber bundles 19 PowerLightGuide bundles 20 Fiber taper products 21 Instructions for use 22 Our glossary

4 4 ABOUT US

5 5 ABOUT US A full range of services for your needs CeramOptec offers customised solutions in fiber optic technology, from individual fibers to ready-to-use cable assemblies. With over 20 years experience in the development and production of optical fibers and everything that goes with it, we are a trusted partner for industry and research. We develop our precision-made solutions in-house, from preform manufacturing to finished cables and bundles, as this allows us to provide you with effective, expert support and meet your individual requirements efficiently. We offer a one-stop solution for all your fiber optics needs. Many prestigious clients rely on our products. We hope that this brochure will provide you with a sound basis for your decision, and we would be delighted to tell you more about our products and processes in person. By the way: we also offer the right fibers and probes for your medical technology needs. Please visit for more information. Your advantages Over 500 Optran UV and Optran WF fibers in stock Non-standard diameters and NA values available Option of fully customised fiber production A complete solution for all your performance needs GMP and ISO 9001 compliant manufacturing environment CE mark From initial enquiry to the finished product

6 6 FIBERS Optran UV, Optran WF Silica / silica fiber with optional buffers Superior performance and fiber optic properties from UV to IR wavelengths: CeramOptec s Optran UV / WF fibers are available in a range of core diameters and assemblies, tailored to your specific application needs. Wavelength Numerical aperture (NA) Optran UV nm Low 0,12 ± 0,02 Optran WF nm Standard 0,22 ± 0,02 High 0,28 ± 0,02 Jacket Polyimide: -190 to +350 C ETFE: -40 to +150 C Nylon: -40 to +100 C Acrylate: -40 to +85 C Pure synthetic, fused silica glass core High resistance against laser damage Step-index profile Special jackets available for high temperatures, high vacuum and harsh chemicals Very low NA expansion Biocompatible material Sterilisable using ETO and other methods Silica glass core Fluorine-doped silica cladding Buffer (if provided) Silicone, hard polymer Technical data Wavelength / spectral range Numerical aperture (NA) Optran UV: nm Optran WF: nm Operating temperature -190 to +350 C 0,12 ± 0,02 0,22 ± 0,02 0,28 ± 0,02 or customised Core diameter Available from 25 to 2000 µm Standard core / cladding ratios OH content Standard prooftest Minimum bending radius Product code See glossary, p : 1,04 1 : 1,06 1 : 1,1 1 : 1,15 1 : 1,2 1 : 1,25 1 : 1,4 or customised Optran UV: high (> 700 ppm) Optran WF: low (< 1 ppm) Fibers with OH contents < 0,25 and < 0,1 ppm are available upon request 100 kpsi (nylon, ETFE, acrylate jacket) 70 kpsi (polyimide jacket) 50 cladding diameter (short-term mechanical stress) 300 core diameter (during use with high laser power) Applications First choice for applications including spectroscopy, medical diagnostics, medical technology, laser delivery systems and many more.

7 7 FIBERS Optran Plus UV, Optran Plus WF High NA pure silica / silica core fiber CeramOptec s Optran Plus is the highest NA pure fused silica core fiber available with NA s of 0,28 and 0,30. Ideal for a broad range of applications, from spectroscopy to sensing. CeramOptec s innovative Optran Plus fibers exhibit exceptional spectral transmission from 190 to 2400 nm with high coupling efficiency. We offer a wide range of standard core sizes and cladding materials, as well as custom fibers to meet your specifications. High laser damage resistance Specialty coatings available for high temperatures, high vacuum and harsh chemicals Biocompatible materials RoHS compliant Step-index profile Pure fused silicia core Sterilizable by ETO and other methods Manufactured at GMP and ISO 9001 compliant facility Pure fused silica core Fluorine-doped silica cladding Jacket Polyimide: -190 to +350 C ETFE: -40 to +150 C Nylon: -40 to +100 C Acrylate: -40 to +85 C Buffer (where applicable) Silicone, hard polymer Technical data Wavelength / spectral range Optran Plus UV: nm Optran Plus WF: nm Numerical aperture (NA) 0,28 ± 0,02 0,30 ± 0,02 or customised Operating temperature -190 to +350 C Core diameter Available from 50 to 2000 µm Standard core / cladding ratios 1 : 1,04 1 : 1,06 1 : 1,1 1 : 1,15 1 : 1,2 1 : 1,25 1 : 1,4 or customised Standard prooftest 100 kpsi (nylon, ETFE, acrylate jacket) 70 kpsi (polyimide jacket) Minimum bending radius 50 cladding diameter (momentary mechanical stress) 150 core diameter (during usage with high laser power) Applications First choice for applications including spectroscopy, medical diagnostics, medical technology, laser delivery systems and many more.

8 8 FIBERS Optran Ultra WFGE Ge-doped silica / silica fiber The CeramOptec Optran Ultra WFGE fibers stand out through maximum numerical aperture values, unmatched performance and a broad spectral range. There is a large choice of core diameters and solutions tailored to your specific needs are available upon request. Wavelength Numerical aperture (NA) Optran Ultra WFGE nm Standard 0,37 ± 0,02 Germanium-doped silica glass core Step-index profile High resistance against laser damage Special jackets available for high temperatures, high vacuum and harsh chemicals Very low NA expansion Biocompatible material Sterilisable using ETO and other methods Hight 0,48 ± 0,02 Very high 0,53 ± 0,02 Germanium-doped silica glass core Fluorine-doped silica cladding Jacket Polyimide: -190 to +350 C ETFE: -40 to +150 C Nylon: -40 to +100 C Acrylate: -40 to +85 C Buffer (if provided) Silicone, hard polymer Technical data Wavelength / spectral range Numerical aperture (NA) Operating temperature -190 to +350 C Optran Ultra WFGE: nm 0,37 ± 0,02 0,48 ± 0,02 0,53 ± 0,02 or customised Core diameter Available from 50 to 1000 µm Standard core / cladding ratios Standard prooftest Minimum bending radius 1 : 1,04 1 : 1,06 1 : 1,1 1 : 1,15 1 : 1,2 1 : 1,25 1 : 1,4 or customised 100 kpsi (nylon, ETFE, acrylate jacket) 70 kpsi (polyimide jacket) 50 cladding diameter (short-term mechanical stress) 150 core diameter (during use with high laser power) Applications First choice for applications including spectroscopy, laser technology, research, photodynamic therapy and many more.

9 9 FIBERS Optran HUV, Optran HWF Silica fiber with hard polymer cladding CeramOptec offers its Optran HUV / HWF fibers as a cost-effective alternative to silica / silica fibers. They provide high numerical aperture values, minimal bend losses and efficient connectorisation for a wide range of applications. Wavelength Numerical aperture (NA) Optran HUV / HWF nm Standard 0,37 ± 0,02 Optran WF nm High 0,48 ± 0,02 Cost-effective (compared to silica / silica fibers) High concentricity All dielectric, non-magnetic design Step-index profile Biocompatible material Sterilisable using ETO and other methods Silica glass core Hard polymer cladding Jacket ETFE: -40 to +150 C Nylon: -40 to +100 C Technical data Wavelength / spectral range Optran HUV and Optran HWF: nm Numerical aperture (NA) 0,37 ± 0,02 0,48 ± 0,02 Operating temperature -40 to +150 C Core diameter Available from 100 to 2000 µm OH content Optran HUV: high (> 1000 ppm) Optran HWF: low (< 1 ppm) Standard prooftest 100 kpsi Minimum bending radius 50 cladding diameter (short-term mechanical stress) 150 core diameter (during use with high laser power) Applications First choice for applications from remote illumination to photodynamic therapy and many more.

10 10 FIBERS Optran PUV, Optran PWF Silica fiber with silicone cladding CeramOptec s silica fibers with silicone cladding ensure low-attenuation transmission from UV to NIR wavelengths. They provide a cost-effective alternative to pure silica fibers that suits a wide range of applications, from remote illumination to spectroscopy. Wavelength Numerical aperture (NA) Optran PUV / PWF nm Standard 0,40 ± 0,02 Cost-effective (compared to silica / silica fibers) High concentricity Step-index profile Biocompatible material Sterilisable using ETO and other methods Standard 0,22 ± 0,02 High 0,28 ± 0,02 (Optran Plus) Silicone cladding Jacket ETFE: -40 to +150 C Nylon: -40 to +100 C Silica glass core Technical data Wavelength / spectral range Numerical aperture (NA) 0,40 ± 0,02 Operating temperature -40 to +150 C Optran PUV and Optran PWF: nm Core diameter Available from 100 to 2000 µm OH content Standard prooftest Minimum bending radius Optran PUV: high (> 700 ppm) Optran PWF: low (< 1 ppm) 100 kpsi 50 cladding diameter (short-term mechanical stress) 150 core diameter (during use with high laser power) Applications First choice for applications from remote illumination to spectroscopy and many more.

11 11 FIBERS Optran MIR Silver halide fiber This unique fiber, which comprises a photosensitive compound (AgCl, AgBr), offers extremely low attenuation values in the mid-infrared (MIR) range. Wavelength Numerical aperture (NA) Optran MIR 4 18 μm Low 0,13 ± 0,02 Optran WF nm Standard 0,25 ± 0,02 High 0,35 ± 0,02 Optimised for CO- and CO2-laser Low attenuation in the MIR range Robust and flexible Non-hygroscopic material Highly reliable connectors available Available in core / cladding or pure core versions Mixed silver halide core Mixed silver halide cladding Peek Tube Technical data Wavelength / spectral range Optran MIR: 4 18 µm Numerical aperture (NA) 0,13 ± 0,02 0,25 ± 0,02 0,35 ± 0,02 Operating temperature -60 to +110 C Standard diameter Core / cladding (µm) 400 / 500 µm 600 / 700 µm 860 / 1000 µm Calculation index (core) 2,1 Reflective 10.6 µm 25 % Minimum bending radius 100 cladding diameter Highest power 30 Watt Applications First choice for applications including CO2-laser guides, FTIR spectroscopy, laser surface treatments and many more.

12 12 FIBERS Optran NCC UV, Optran NCC WF Silica / silica non-circular core fiber These fibers are ideal for laser applications, among others, where the geometry of the output beam is decisive. Ceram Optec offers these fibers in rectangular, square, octagonal and other core / cladding geometries for additional advantages compared to our UV / WV range. Wavelength Numerical aperture (NA) Optran NCC UV nm Low 0,16 ± 0,02 Optran NCC WF nm Standard 0,22 ± 0,02 High 0,28 ± 0,02 Sample rectangular-core fiber Wide range of core and cladding geometries, e.g. square, rectangular or octagonal Homogeneous power distribution Very low NA expansion Excellent image scrambling characteristics No need for laser beam-shaping optics High resistance against laser damage Step-index profile Biocompatible material Sterilisable using ETO and other methods Sample octagonal-core fiber Sample square-core fiber Technical data Wavelength / spectral range Numerical aperture (NA) Operating temperature -190 to +350 C Core diameter OH content Standard prooftest Minimum bending radius Optran NCC UV: nm Optran NCC WF: nm 0,16 ± 0,02 0,22 ± 0,02 0,28 ± 0,02 or customised Geometries and diameters upon request Optran NCC UV: high (> 1000 ppm) Optran NCC WF: low (< 1 ppm) Fibers with OH contents < 0,25 and < 0,1 ppm are available upon request 100 kpsi (nylon, ETFE, acrylate cladding) 70 kpsi (polyimide cladding) 50 cladding diameter (short-term mechanical stress) 150 core diameter (during use with high laser power) Applications First choice for applications including laser surface treatments, astronomy applications and many more.

13 13 FIBERS Optran NCF UV, Optran NCF WF Silica / silica non-circular fiber Pure fused silica / F-doped fused silica square and rectangular shaped fibers Fibers which deviate from the traditional round form with a square or rectangular shape offers advantages due to providing maximum packing density for input and output. These fibers are very suitable for connections to angular sources and receivers, e.g. diode lasers. The angular shaped core provides consistent short-distance homogenization input power distribution. Our angular fibers are also available in rectangular shapes with large side ratios and a small corner radius, thanks to our special PCVD-technology. Large NCF's are ideal for applications which require a combination of flexibility and large cross sections in silica fibers, e.g. a diode laser delivery system. To name an example, the geometry of a rectangular optical fiber with a ratio of 1 : 3 allows for rotation and movement on one axis. The cross section is but about four times larger than that of a round fiber (round fiber / diameter rectangular fiber / page size). Maximum packing density for input or output of bundle Suitable for diode laser coupling Homogeneous power distribution Wide range of available core and cladding sizes The same cross section ratio of the core provides higher flexibility compared to round fibers High resistance against laser damage No need for laser beam focusing optics Very low NA-expansion Excellent image scrambling characteristics Step-index profile Applications Excellent choice for applications that include diode laser coupling and many more.

14 14 FIBERS Optube CT, Optube CTH Flexible Silica Capillary Tubing CeramOptec s innovative Optube flexible silica capillary tubing offers the highest temperature capability in the industry at 400 C (Optube CTH). With impressive tensile strength and pressure resistance, Optube CT and CTH are ideal for several applications, from gas chromatography to electrophoresis. We offer our high quality capillary tubing in a variety of sizes, as well as custom designs to meet your specifications. High tensile strength (> 600 kpsi) Temperature resistance to 375 C (Optube CT) and 400 C (Optube CTH) Pressure resistant to 4500 psi Chemical resistance (polyimide coating) Smooth inner surface Pure, synthetic fused silica High OH content for easy surface bonding to siloxanes Standard prooftest: 100 kpsi Intrinsic strength > 600 kpsi Jacket Protective Coating (Polyimide) Pure, Synthetic Fused Silica Tubing Technical data Inner diameters > 10 to 2500 µm Wall thickness > 10 µm to 1 mm End finish Cleaved or polished Diameter tolerance To ± 5 % Applications First choice for applications including gas chromatography, liquid chromatography, electrophoresis, precision casting inserts and many more.

15 15 FIBERS Fiber optic Feedthroughs Pressure and Vacuum Feedthroughs CeramOptec s pressure and vacuum feedthroughs offer exceptional reliability and smooth operation for even the most demanding applications. Manufactured to your specifications, our vacuum feedthroughs are available in any cell, flange, port designs and are ideal for a wide range of wavelengths. Physical Data of Standard Interconnects Vacuum Feedthrough Length Diameter Material Pressure Feedthrough Length Diameter Material Available Fiber Connector Interface 60 mm 10 mm stainless steel 60 mm 20 mm stainless steel Multimode Polyimide Coated Fiber SMA 905 SMA 906 ST FC Custom Ferrules Physical Data of Standard Pigtails Length Diameter Material Available Fiber Connector Interface 50 mm 10 mm stainless steel Multimode Polyimide Coated Fiber SMA 905 SMA 906 ST FC Custom Ferrules Technical data Compressive strength for bar Vacuum Feedthrough Compressive strength for 680 bar 2040 bar (short-term) Pressure Feedthrough Temperature Vacuum Feedthrough: up to 175 C Pigtail up to 250 C Insertion Loss of Interconnects -0,8 to -2,0 db

16 16 FIBERS At a glance Comparison of attenuation values The following diagrams provide an overview of attenuation values relative to the wavelengths of our various Optran fibers: Optran UV, WF and Optran Plus UV, WF Optran Ultra WFGE Typical Optran and Optran Plus UV fiber Typical Optran and Optran Plus WF fiber Typical Optran Ultra WFGE fiber Attenuation (db/km) %* 90 %* Attenuation (db/km) %* 90 %* %* 99 %* ,9 %* 99,9 %* Wavelength (nm) Wavelength (nm) Optran HUV, Optran HWF Optran PUV, Optran PWF Typical Optran HUV fiber Typical Optran PUV fiber Attenuation (db/km) Typical Optran HWF fiber 50 %* 90 %* Attenuation (db/km) Typical Optran PWF fiber 50 %* 90 %* %* 99 %* ,9 %* 99,9 %* Wavelength (nm) Wavelength (nm) Optran NCC UV, Optran NCC WF Optran MIR Attenuation (db/km) Typical Optran NCC UV fiber Typical Optran NCC WF fiber 50 %* 90 %* Attenuation (db/m) Typical Optran MIR fiber 35 %* %* %* 99,9 %* 1 80 %* %* Wavelength (nm) Wavelength (nm) *Transmission/m

17 17 FIBER CABLES Fiber cables Single-fiber assemblies CeramOptec offers a comprehensive range of cables and high-power cables tailored to your specific application needs. As we maintain complete control over the entire process, from preform manufacturing to the finished product, we are able to supply cables that meet the most demanding requirements regarding quality and fiber optic properties. Broad temperature range High resistance against laser damage Special jackets available for high temperatures, high vacuum and harsh chemicals Constant core / cladding ratio throughout the entire fiber All dielectric, non-magnetic design Sterilisable using ETO and other methods Biocompatible material AR coating Various lengths available Customised ferrules (also for non-circular fiber geometries) Options Available fibers Connectors Protection tubes All fibers from our range SMA FC / PC ST and others upon customer request Customised ferrules PVC PTFE Kevlar C-Flex Kevlar-reinforced PVC Metal Steel and others

18 18 FIBER BUNDLES Fiber bundles Multi-fiber assemblies CeramOptec s fiber bundles are designed for superior quality and optimum fiber optic properties. We optimise your bundles for various parameters, including NA and packing efficiency. Our fiber assemblies can be flexibly configured and tailored precisely to your application needs. Broad temperature range High-temperature ferrules Vacuum compatibility Radiation resistance Maximum fiber efficiency Completely in-house production Option of fiber sorting Options Available fibers Active bundle surface geometries Bundle design Bundle variant Connectors All fibers from our range Circular Semi-circular Square Rectangular Line Ring Segmented ring Single-branch Dual-branch Multi-branch Glued Fused end SMA FC / PC ST and others upon customer request

19 19 FIBER BUNDLES PowerLightGuide bundles Fused end bundles CeramOptec s fused-end PowerLightGuide bundles set the benchmark for consistently high long-term performance. The fusing process completely eliminates inter-fiber spaces and thus positions CeramOptec s PowerLightGuide bundles among the most sophisticated fiber bundles on the market. As the bundles do not rely on adhesive, they are resistant to temperatures of more than +600 C, making them the first choice for demanding applications! Wavelength High transmission No inter-fiber spaces Large active diameter Wide range of ready-to-use assemblies available Long service life Even distribution in multi-branch bundles High temperature resistance above +600 C Consistent transmission even when the bundle is moved Biocompatible material Multiple fused ends possible Numerical aperture (NA) PowerLightGuides nm Low 0,12 ± 0,02 Standard 0,22 ± 0,02 High 0,37 ± 0,02

20 20 TAPERED FIBERS Fiber taper products Optran UV, WF, Ultra WFGE D2 D1 CeramOptec s fused tapered fibers can be deployed from the deep UV to the NIR range. Taper products are required where input and output diameters differ. CeramOptec offers a wide range of options, including for special applications. Broad temperature range High resistance against laser damage Special jackets available for high temperatures, high vacuum and harsh chemicals High core / cladding ratio Constant core / cladding ratio throughout the entire fiber All dielectric, non-magnetic design Sterilisable using ETO and other methods Biocompatible material Formula A tapered optical fiber acts as a beam diameter and numerical aperture converter, with the input beam being converted according to the following formula: NA1: Input NA NA2: Output NA D1: Input diameter D2: Output diameter The output NA is limited by the NA of the fiber used, which may result in a loss of light. Technical data Available fibers Optran UV Optran WF Optran Plus UV Optran Plus WF Optran WFGE Wavelength From deep UV to NIR Core diameter Available from 50 to 1000 µm Standard taper ratios 2 : 1 3 : 1 4 : 1 5 : 1 Standard prooftest 100 kpsi Minimum bending radius mm (depending on the selected fiber diameter)

21 21 CUSTOMER INFORMATION Instructions for use Fibers, fiber cables, fiber bundles Please note the following information to ensure the long-term safe use of your fiber products: Safety 1. The NA of the laser beam must be smaller than the NA of the fiber. 2. The laser beam must be precisely directed towards the core diameter or fused bundle, as connectors or adhesive between the bundles may otherwise overheat. 3. It is recommended to have the laser energy distributed evenly (instead of a Gaussian distribution). Application 1. Clean the fiber endface before switching on the laser. 2. Ensure that the ferrule and receptacle are entirely free from any contamination, as contaminants may burn in. 3. The cable / bundle surface may be cleaned with isopropyl alcohol, ideally under a microscope using a cotton bud. 4. Ensure that the optical axes are correctly aligned and not at an angle to each other, and that the focal point is correctly aligned. It is recommended to verify the alignment using a He-Ne laser. 5. Ensure that the minimum bending radius is complied with to prevent fiber breakage.

22 22 CUSTOMER INFORMATION CeramOptec glossary We have explained some important concepts of fiber optics below. Please do not hesitate to contact us if you have any questions. Fiber optics Optical fiber Fiber bundle Core Cladding Numerical aperture (NA) Ultraviolet Visible spectrum Attenuation Bend loss Transmission The branch of optical technology concerned with the transmission of radiant power through fibers made of transparent materials such as glass, fused silica or plastic. (Also optical waveguide, fiber optic cable, optical cable) a thin filament of drawn or extruded glass or plastic having a central core and a cladding of lower-index material to promote internal reflection. A rigid or flexible, concentrated assembly of glass or plastic fibers used to transmit light. The light conducting portion of an optical fiber. It has a higher refractive index than the cladding. Low refractive index material that surrounds the core of an optical fiber. It contains the core light while protecting against surface scattering. The cladding can consist of fused silica, plastic or specialty materials. In fiber optics, the NA describes the range of angles at which light can enter and exit the system. NA is an important parameter in applied fiber optics. The invisible region of the spectrum beyond the violet end of the visible region. Wavelengths range from 1 to 400 nm. The region of the electromagnetic spectrum to which the retina is sensitive and by which the eye sees. It extends from about 400 to 700 nm in wavelength. The phenomenon of the loss of average optical power in an optical fiber or medium. Loss of power in an optical fiber due to bending of the fiber. Usually caused by exceeding the critical angle required for total internal reflection by internal light paths. In optics, the conduction of radiant energy through a medium. Often denotes the percentage of energy passing through an element or system relative to the amount that entered. Product code key using the example of WF 300/330 (H)(B)N (28) 1 Fiber type UV = Optran UV WF = Optran WF WFGE = Optran WFGE HUV = Optran HUV HWF = Optran HWF 2 Standard core / cladding ratios Core ø (µm) / Cladding ø (µm) 3 Buffer H = hard polymer buffer No information = silicone buffer 4 Colour B = black BL = blue W = white Y = yellow R = red G = green No information = transparent 5 Jacket material A = acrylate jacket (no buffer) N = nylon jacket (silicone or hard polymer jacket) T= ETFE jacket (silicone or hard polymer buffer) P = polyimide jacket (no buffer) 6 Numerical aperture (NA) 12 = 0,12 28 = 0,28 No information = 0,22 (standard)

23 You know what you need? Or would you like expert advice on your specific field of application? We are there for your support and look forward to hearing from you!

24 CeramOptec REF201604_B Our international presence Your local contact Headquarter Production sites Distribution partners CeramOptec GmbH Siemensstr. 44, Bonn Germany Sales and Development Brühler Straße 30, Bonn Germany Phone: Fax: CeramOptec GmbH Brühler Straße 30, Bonn Germany CeramOptec SIA Domes iela 1a, 5316 Livani Latvia U.S.A. US Fiberoptec Technology, Inc. 175 Bernal Road, Suite #15 San Jose, CA 95119, U.S.A. Phone: Fax: Japan Prolinx Corporation Orix Kandasuda-cho Buldg 6F Kandasuda-cho Chiyoda-ku Tokyo, , Japan Phone: Fax: China Aunion Tech Co., Ltd. Room 905, F Building Everbright Convention and Exhibition Center, No. 86 Caobao Road Shanghai , P.R. China Phone: Fax: *8009 sales-china@ceramoptec.com India Dynotech Instuments Pvt. Ltd , Vishwa Sadan District Centre, Janak Puri New Delhi , India Phone: Fax: dynotech@vsnl.com Korea Unitech International Corp Treezium Jamsil 3 Dong Songpa Gu, Seoul, Korea Phone: Fax: esalsa@kornet.net