Reliability test report for SR15-9/125-ACL (SM Fiber with high temperature resistant acrylate coating) Introduction This document describes the reliability test results on Fujikura’s SR15-9/125-ACL. 1. Product specification Operating Wavelength 1550 nm Mode Field Diameter 9.8±0.7 mm at 1550nm Core concentricity error ≤0.7 mm Cladding diameter 125.0±1.0 mm Cladding non-circularity ≤1 % Coating diameter 245±10 mm Attenuation ≤0.25 dB/km at 1550 nm Fiber cutoff wavelength ≤1.3 mm Maximum operating temperature 200 oC Proof level ≥1 % (≥100 kpsi) 2. Test items and results The following tests are performed to confirm the quality of SR15-9/125-ACL. 2-1. Environmental tests at high temperature 1. Attenuation changing (200oC, 150 oC) 2. Coating diameter changing (200 oC, 150 oC) 3. Thermo Gravimetry and Differential thermal analysis (30 oC up to 400 oC) 2-2. Mechanical tests at high temperature 1. Tensile strength on short-length fiber (200 oC, 150 oC) 2. Dynamic fatigue value (nd) (200 oC, 150 oC) The following sheets contain the purposes, procedures and results of the tests. 1/7 Item No. Test Item 2-1-1 Attenuation changing (200 oC , 150 oC ) Introduction This test is performed to evaluate the stability of attenuation of SR15-9/125-ACL by using a loss measurement system. Procedure Method ; Backscattering technique (ITU-T G650) Specimen ; 1000 m length fiber to each condition. Apparatus ; Optical time domain refract meter Wavelength ; 1310 nm or 1550 nm Test condition ; 200 oC 7days, 150 oC 30days/100days Results Table1. Attenuation variation at operating wavelength 1310nm. Condition Duration Attenuation variation (dB/km, @1310 nm) Attenuation 200 oC 7 days changing 150 oC 30 days/100days ≦0.01 Table2. Attenuation variation at operating wavelength 1550nm. Duration Condition Attenuation variation (dB/km, @1550 nm) Attenuation 200 oC 7 days changing 150 oC 30 days/100days ≦0.01 Attenuation change in 150oC Attenuation[dB/km] Attenuation [dB/km] Attenuation change in 200oC 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 1550nm 1310nm 0 1 2 3 4 5 6 7 Days 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 1550nm 1310nm 0 20 40 60 80 100 Days Fig. 1 Attenuation change in 200 oC Fig. 2 Attenuation change in 150 oC Table 1, 2 and Fig.1, 2 shows the results of attenuation variation. We obtained not more than 0.01dB/km variation at both 1310 nm and 1550 nm. 2/7 Item No. Test Item 2-1-2 Coating resin diameter changing (200oC , 150oC ) Introduction This test is performed to evaluate the coating resin stability of SR15-9/125-ACL. Procedure Specimen ; 0.1 m length fiber to each condition. ; Diameter of 125 mm clad and 240 mm coating Test condition ; 200oC 7days, 150 oC 30days Results Table3. Coating resin decrement. Coating resin decrement (mm) Condition Duration Coating resin diameter changing 200 oC 7 days 25 150 oC 30 days 10 Coating diameter changing 245 Coating diameter (micron) 240 235 230 225 220 200 oC 215 150 oC 210 205 200 0 5 10 15 20 25 30 35 Duration(days) Fig. 3. Coating resin diameter changing. Table 3 and Fig.3 shows the results of coating resin decrement. We obtained only 25 mm coating resin decrement and it shows good coating stability. 3/7 Item No. Test Item 2-1-3 Thermo Gravimetry and Differential thermal analysis Introduction This test is performed to evaluate the coating resin stability of SR15-9/125-ACL. Thermo Gravimetry(TG) A technique in which the mass of the sample is monitored against time or temperature while the temperature of the sample, in a specified atmosphere, is programmed. Differential thermal analysis(DTA) A technique in which the difference in temperature between the sample and a reference material is monitored against time or temperature while the temperature of the sample, in a specified atmosphere, is programmed. Procedure Specimen ; Coating resin of SR15-9/125-ACL. Test condition ; 30 oC up to 400 oC, 2 oC /min, at air Results TG/DTA 100 30 98 TG 96 DTA 20 92 90 15 88 10 86 84 DTA[μV] TG[%] 94 25 5 82 0 80 0 100 200 Temperature[oC] 300 400 Fig. 4. TG/DTA. Fig.4 shows the coating resin is stable until around 250 oC. In the condition under 200 oC, we use the fiber without problem. 4/7 Item No. Test Item 2-2-1 Tensile strength on short length fiber Introduction This test is performed in accordance with IEC and GR-20 to evaluate the tensile strength of unaged/aged fibers. Procedure Method ; Tensile strength of optical fibers (IEC60793-1-B2) Specimen ; 0.5 m length of fiber per test Strain rate ; 10 %/min. Number of test ; 10 times Aging condition ; Aging conditions are listed below. Origin Condition Duration 23 +/- 5 oC NA 200 oC 7 days 150 oC 30 days/100days High temperature aging Criteria Unaged fiber : Not less than 3.8 GPa at F(50) value. (GR20 recommended) Aged fiber :Not less than 3.03 GPa at F(50) value. (GR20 recommended) Results Table4. Tensile strength. Origin ln(ln(1/(1-F))) F：Accumulated failure ratio High temperature aging Condition Duration F(50) value(GPa) 23+/- 5 oC, NA 5.1 200 oC 7 days 5.3 150 oC 30 days / 100days 5.1 / 5.2 1.50 Origin 1.00 200 oC 7days 0.50 150 oC 30days 0.00 150 oC 100days -0.50 -1.00 -1.50 -2.00 -2.50 -3.00 1.00 10.00 Failure stress (GPa) Fig. 5. Weibull distribution of tensile strength. Weibull plot parameter of tensile strength is shown in Table 4. The origin has 5.1GPa, on the other hand, the aged (150 oC, 100days) has 5.2 GPa. It is found that the fiber has a good tensile strength. 5/7 Item No. Test Item 2-2-2 Dynamic fatigue value (nd) Introduction This test is performed in accordance with IEC and GR-20 to get the dynamic stress corrosion susceptibility parameter of unaged/aged fibers. Procedure Method ; Dynamic fatigue by axial tension (IEC60793-B7A) Specimen ; 0.5 m length of fiber per test Strain rate ; 100 %/min., 10 %/min., 1 %/min., 0.1 %/min. Number of test ; 10 times Criteria The dynamic stress corrosion susceptibility parameters, nd, should be ≧ 18. (GR20 recommended) Results Table5. Dynamic fatigue value(nd). Origin High temperature aging Condition Duration nd 23+/- 5 oC, NA 20 200 oC 7 days 20 150 oC 30 days / 100days 20 / 21 Origin 1.5 ln(ln(1/(1-F))) F：Accumulated failure ratio 1.0 0.5 0.0 -0.5 -1.0 960MPa/s 97MPa/s -1.5 8MPa/s -2.0 1MPa/s -2.5 -3.0 -3.5 0 1000 2000 3000 4000 Failure stress (MPa) 5000 6000 Fig. 6. Weibull distribution (origin, nd =20). The origin has 20, on the other hand, the aged (150 oC, 100days) has 21. It is found that our fiber's nd is upper GR20 recommended one, even if the fiber is aged. 6/7 3. Conclusion We developed single-mode fiber with high temperature resistance coating. It was confirmed that this fiber has small attenuation variation (≦0.01dB/km) in 150oC or 200oC and good coating stability. The tensile strength is 5.1GPa (aged) and dynamic fatigue value (nd) is 20(aged). It will be applied to a harsh environment like Oil & Gas industry. 7/7