3M Optical Fiber Cable Specification

Transcription

1 3 3M Optical Fiber Cable Specification 1(2)-Fiber/Bending Insensitive/Low Water Peak Single-mode Fiber/Tight Jacket Indoor FRP Cable (Indoor Application)

2 1 General This specification covers the design requirements and performance standards for the supply of bending insensitive, low water peak, single-mode optical fiber and tight jacket Indoor FRP cable. The features described in this document are intended to provide information on the performance of 3M optical fiber cable and aid in handling and installation. This specification describes the indoor fiber cable--frp cable. The cable contains 1 or 2 single-mode optical fibers. 1.1 Cable Description Protective coatings are applied over the glass cladding to provide the necessary maximum fiber lifetime. Strength member and sheath are applied over the optical fibers. 1.2 Quality 3M ensures a continuing level of quality of our cable products through several programs including ISO Reliability 3M ensures product reliability through rigorous qualification testing of each product family. Both initial and periodic qualification testing are performed to assure the cable s performance and durability in the field environment. 1.4 Reference ITU-T G.657A, IEC ,YD/T and YD/T

3 2 Optical Fiber Cable Structure 2.1 Optical Fiber Construction Core material: Cladding material: Mold field diameter at 1310nm at 1550nm Cladding diameter: Coating material: Coating diameter: Germanium doped Silica glass Silica glass 8.6±0.4µm 9.8±0.4µm 125±0.7µm UV curable material 250±10µm Optical Characteristics Attenuation at 1310nm: at 1550nm: at 1625nm: Chromatic dispersion at 1550nm: Zero dispersion wavelength: Zero dispersion slope: Macro bending loss at φ30mmx1turn, λ=1625mm: Cut-off wavelength (λcc): 0.36dB/km 0.22dB/km dB/km +18ps/km/nm nm 0.092ps/(nm 2.km) 0.05dB 1260nm Fiber Mechanical Characteristic Filter rate: Minimum bending radius: Coating strip strength: Proof stress: Cladding non-circularity error: Cladding/core concentricity error: Filter strain mm Peel: N Mean: 1-5N 0.69Gpa 0.7% 0.5µm 3

4 2.2 Optical Fiber Cable Cable construction FRP strength member Cable construction Number of core: Strength member material: Strength member diameter: Strength member number: Sheath material: Sheath color: Cable diameter: 1/2 Aramid FRP 0.5mm 2 Flame retardant polyethylene (LSZH) Black (Or White) 2.0±0.2mm, 3.0±0.2mm Cable Mechanical Characteristic: Attenuation at 1310nm: at 1550nm: Tensile strength: Crush resistance: Side force performance: 0.40dB/km 0.30dB/km 100N (Short term YD/T ) 60N (Long term YD/T ) 1000N/100mm (Short term YD/T ) 300N/100mm (Long term YD/T ) 1940N/10cm 1min (IEC ) Coating Color: Each fiber shall be identifiable throughout the length of the cable in accordance with the following color sequence: Fiber No 1 core 2 cores Color White Blue, White 4

5 Sheath marking: The length and identification marking are printed on the sheath at one meter interval with white color. The accuracy of the length marking shall be ±1.0%. Re-marking is yellow color if necessary. Content of the identification marking for instance: Type of fiber: Name of manufacturer: Year of manufacture: Type of cable: e.g. 1*SM 9/125 e.g. 3M e.g e.g. FRP e.g. 3M FTTH Drop Cable 1*SM m Flame retardant polyethylene: Comply to YD/T Criteria 3 Temperature and Humidity The cable shall retain the optical properties, detailed in the present specification over the following condition: Working/Storage Temperature: Humidity: -30 o C--+70 o C % 4 Packing and shipping Each factory length of the cable shall be coiled on a suitable reel. The cable packaging length is 2km After completion of the tests, both ends of the cable shall be sealed by a suitable method. The cable ends shall be fastened so as not to protrude beyond any portion of the reel and to prevent the cable from becoming loose in transport 5

6 5 Appendix 3M FRP Fiber Cable Test Method and Requirement 5.1 Performance Requirement The characteristics of optical fiber in the optical fiber cable Single-mode or multi-mode optical fiber in the optical fiber cable should comply with the relevant prescriptions of GB / T 9771 (all the parts) Performance of Sheath The mechanical properties of sheath should comply with the prescriptions of Table 1. Table 1 Mechanical and physical properties of sheath No. Item Unit Indicators of the sheath flame retardant polyethylene Tensile Before thermal aging Mpa strength treatment (min.) 10.0 Changing rate of before % and after thermal aging 20 1 treatment TS (max.) Temperature of thermal C aging treatment 100±2 Time of thermal aging H treatment Elongation Before thermal aging % at break treatment (min.) 125 After thermal aging % treatment (min.) 100 Changing rate of before % 2 and after thermal aging 20 treatment EB (max.) Temperature of thermal C aging treatment 100±2 Time of thermal aging h treatment Heat shrinkable rate 5 3 Temperature of thermal aging C treatment 115±3 Time of thermal aging treatment h 4 Thermal shock resistance Temperature of thermal aging C - - treatment Time of thermal aging treatment h Pressure resistance under high % - - temperature (minimal mean value) Temperature of thermal aging o C - - treatment 6

7 6 Time of thermal aging treatment h - - Environmental stress cracking piece 0/10 - resistance (50 o C,96h) Mechanical Properties of the Optical Fiber Cable Mechanical properties of the optical fiber cable should include tensile strength, crush resistance, impact, repeated bending, torsion, twisting, meander and winding, etc, and should be inspected through the test methods and conditions prescribed in The tensile strength and crush resistance force allowed of optical fiber cable should meet the requirements of Table 2. Table 2 Minimum Cable tensile strength and Crush Resistance Item Indoor use Non-metallic Metallic Short-term tensile strength(n) Long-term tensile strength(n) 60 - Short-term Crush Resistance(N/100mm) Long-term Crush Resistance(N/100mm) The minimum bending radius of the optical fiber cable is expressed by the multiple of the cross section short axis H of flat cable and the diameter D of round cable. Under the dynamic bending, the flat cable is 20H; round cable is 20D, but no more than 100mm. Under the static bending, the flat cable is 10H; round cable is 10D, but no more than 20mm Environmental Performance of Optical Fiber Cable The environmental performance of optical fiber cable include the items such as attenuation temperature characteristics, combustion characteristics and low temperature winding performance etc, and should be inspected through the test methods and test conditions prescribed in Applicable temperature scope and attenuation temperature characteristics Table 3 Temperature characteristics of the optical fiber cable Classification Applicable temperature scope Additional attenuation, db/km code Lower limit, T A Higher limit, T B B1.3 G.657B B4 a) -20 o C +60 o C Not more than 0.05 b) -40 o C +60 o C Note: the temperature range can be chosen according to the requirements of user. Temperature range is usually -40 C to +60 C Combustion Performance of the Flame Retardant Optical Fiber Cable Combustion performance of the flame retardant optical fiber cable should meet the following requirements: Flame retardant: according to the requirements of user, the cable should pass single vertical combustion test, single horizontal combustion test, single tilt combustion test or bunched combustion test. 7

8 Smoke concentration: the transmittance should not less than 50% under the fumes released when the optical fiber cable is burning; any other requirements from user should also be met. Corrosion: the PH value should no less than 4.0, and the conductivity should no more than 10µs/mm of the gases released when the optical fiber cable is burning Winding performance under low temperature Optical fiber cable of which temperature characteristics is level b should be resistant to winding under -15 o C. 5.2 Test Methods General Principles The performances of optical fiber cable should be validated according to the test methods prescribed in Table 4. Table 4 Test items, methods and inspection rules Test methods No. Item Article No. in this part 1 Structural integrity and appearance of the optical fiber cable Inspecting Categories in this part 100% 2 Structural dimension of the optical fiber cable 2.1 Dimension of Strength member GB/T % 2.2 Thickness and width of the GB/T % sheath 3 Length of the optical fiber cable in this part 100% 4 The fiber characteristics of optical fiber cable 4.1 Dimension parameters of the GB/T % optical fiber Optical characteristics and 4.2 transmission characteristics Single mode optical fiber MFD and dispersion GB/T % Attenuation Coefficient GB/T % 5 Performance of the sheath Tensile strength and elongation Table 1 YD/T at break, before and after heat aging 5.2 Thermal shrinkable rate Table 1 YD/T Thermal shock resistance Table 1 YD/T Deformation rate under the Table 1 YD/T pressure of high temperature 5.5 Environmental stress cracking Table 1 YD/T resistance 6 Mechanical characteristics of the in this part - optical fiber cable 8

9 7 Environmental performance of - the optical fiber cable 7.1 Attenuation temperature in this - characteristics part Combustion performance of the - flame retardant optical fiber cable a) Performance of flame GB/T retardant GB/T12662 b) Smoke concentration GB/T c) Corrosion GB/T Winding performance in low in this - temperature part 9 Signs of the optical fiber cable 9.1 Integrity and recognition of the Visual 100% signs inspection 9.2 Fastness of the signs in this - part 9.3 Error of measuring meter signs in this - part 10 Package Visual 100% inspection Note: the percentage in delivery inspection column is the smallest percentage of the sampling based on the product unit Structural Inspection of the Optical Fiber Cable The visual inspection of the integrity and structural dimension of the optical fiber cable should be carried out at least 100mm from the end of the optical fiber cable Inspection of the Optical Fiber Cable Signs Signs Wiping a) Test method: method 2 of E2B Signs wearing in GB/T ; b) Load: 10N; c) Cycle times: no less than 5; d) Qualification Criterion: signs of the sheath can be identified visually Error of Measuring Meter Signs The measurement error of length should be the relative difference between the length measured by the steel tape along the optical fiber cable in suitable length and the length determined in measuring meter number (see 5.2.4) Inspection of the Optical Fiber Cable Length The length of optical fiber cable is determined by the difference of number in measuring meter sign between two ends of optical fiber cable, also may be measured through optical methods (such as OTDR instrument). 9

10 5.2.5 The Mechanical Properties of Optical Fiber Cable General Principles The various test methods and test conditions as follows are used to validate the mechanical properties of optical fiber cable. When the test results meet the prescribed qualification criteria, the cable is qualified. The monitoring of optical fiber attenuation change in the mechanical properties test should adopt the monitoring method of transmission power prescribed in YD/T During the test, the uncertainty of the monitoring results caused by the stability of monitoring system should be better than 0.03dB. The attenuation can be determined to be no significant change when the absolute value of optical fiber attenuation variation is no more than 0.03dB in the test. Allowing the change of certain value of attenuation means the value has included uncertainty Tensile strength a) Test method: method E1 in GB/T ; b) Chuck diameter: about 250mm; c) Length tested: no less than 50m; d) Tensile rate: 100mm/min; e) Tensile load: lasting for 1min in the long-term tensile strength and for 5 min in the short-term tensile strength prescribed in Table 2. f) Qualification Criterion: the optical fiber should have no obvious additional attenuation and the strain should be no more than 0.2% in the long-term allowed tensile strength; the strain should be no more than 0.3% in the short-term tensile strength; there should be no obvious residual additional attenuation after the removal of the tensile strength, and the sheath should have no visible cracking Crush resistance a) Test method: method E3 in GB/T ; b) Load: lasting for 1min in the long-term and short-term tensile strength prescribed in Table 2 respectively; c) Qualified Criterion: the optical fiber should have no obvious additional attenuation in the long-term crush resistance; the optical fiber should not be fractured in the short-term crush resistance, and the sheath should have no visible cracking Impact a) Test method: method E4 in GB/T ; b) Radius of middle block: cylindrical radius R12.5mm; c) Weight of impact hammer: 1N; d) Fall of impact hammer: 1m; e) Impact position: no less than 0.5m form the end of the sample; f) Impact times: at least 5; g) Qualification Criterion: the optical fiber should not be fractured in the short-term crush resistance, and the sheath should have no visible cracking Repeated Bending a) Test method: method E6 in GB/T ; b) Diameter of the central spindle: 40H (flat cable) or 40D (round cable), but no less than 200mm (see ); c) Load: 40N; d) L value: 500mm; e) Bending times: 1000; 10

11 f) Qualification Criterion: the optical fiber should have no obvious residual additional attenuation, and the sheath should have no visible cracking. Note: the flat cable should only bend in the direction of flat Torsion a) Test method: method E7 in GB/T ; b) Axial tensile strength: 20N; c) Torsion length: 250mm; d) Torsion angle: ±90 (no less than 30 times/min); e) Torsion times: 20; f) Qualification Criterion: the optical fiber should not be fractured and the sheath should have no visible cracking Twisting a) Test method: method E8 in GB/T ; b) Diameter of pulley: 40H (flat cable) or 40D (round cable), but no less than 100mm (see ); c) Axial Tensile strength: 20N; d) Block speed: 10 cycles/min; e) Cycle times: 1000; f) Qualification Criterion: the optical fiber should not be fractured and the sheath should have no visible cracking. Note: the flat cable should only bend in the direction of flat Meander a) Test method: method E10 in GB/T ; b) Allowed diameter of the optical fiber cable ring: 20H (flat cable) or 20D (round cable), but no less than 50mm (see ); c) Qualification Criterion: there should no meander,the optical fiber should not be fractured and the sheath should have no visible cracking. Note: the flat cable should only bend in the direction of flat Winding a) Test method: method E11A in GB/T ; b) Diameter of central axis: 20H (flat cable) or 20D (round cable), but no less than 50mm (see ); c) Tensile strength: 20N d) Close winding turn: 6 turns/time; e) Cycle times: 10; f) Qualification Criterion: the optical fiber should not be fractured and the sheath should have no visible cracking. Note: the flat cable should only bend in the direction of flat Environmental Performance Test of Optical Fiber Cable General Principles The test methods and test conditions as follows are used to validate environmental performance of optical fiber cable. When the test results meet the qualification criteria, cable is qualified Temperature Cycling Test a) Test method: method F1 in GB/T

12 b) Sample length: should be sufficient to obtain the required accuracy of attenuation measurement, and no less than 2km is better. c) Temperature range: Lower limit TA and higher limit TB of the temperature range should meet the prescriptions of Table 3. d) Holding time: t1 should be sufficient to achieve stable temperature of the sample, and no less than 8h is better. e) Cycle times: 2. f) Attenuation monitoring: should be carried out based on the prescriptions of YD/T monitoring method of optical fiber transmission attenuation changes Part 2: monitoring method of back scattering. During the test, the uncertainty of the monitoring result caused by the repeatability of the monitoring instrument should be better than 0.02dB/Km.The attenuation can be determined to be no significant change when the absolute value of optical fiber attenuation variation is no more than 0.02dB/Km in the test. Allowing the change of certain value of attenuation means the value has included uncertainty. The monitoring of single-mode optical fiber attenuation change should be carried out on 1550nm wavelength, and the monitoring of multi-mode optical fiber attenuation change should be carried out on 1300nm wavelength. g) Qualification Criterion: should meet the prescriptions of Table Combustion performance of flame retardant optical fiber cable. Flame retardant: according to the prescriptions of GB/T Smoke concentration: according to the prescriptions of GB/T Corrosion: according to the prescriptions of GB/T Winding Test under Low Temperature a) Test method: see method E11A in GB/T and GB/T ; b) Sample length: several meters short piece; c) Diameter of central axis: 20H (flat cable) or 20D (round cable) (see ); d) Test temperature: -15 o C; e) Winding times: 4 cycles; f) Qualification Criterion: the optical fiber should not be fractured and the sheath should have no visible cracking. Note: the flat cable should only bend in the direction of flat Aging Test To be determined. 12