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Polyimide-coated F-doped single-mode optical fibers

Polyimide-coated single mode F-doped fibers are high temperature (-196 to +300C)optical fibers that can be used for both high-temperature and cryogenic applications. This fiber type is used in sensor systems for biomedicine, oil and gas industry, aircraft applications, etc.

 

Polyimide-coated single-mode optical fiber

ОК-6/125F-PI

ОК-9/125F-PI

Core diameter, µm 6.8 ± 0.5 9.1 ± 0.5
Mode field diameter (Gauss), µm 7.5 ± 0.5 10 ± 0.5
Clad diameter, µm 125 ± 1 125 ± 1
Coating diameter, µm 155 ± 5 155 ± 5
Fiber type Single mode Single mode
Coating material Polyimide Polyimide
Cladding offset, % < 2 < 2
Coating offset, % < 5 < 5
Attenuation at 1550 nm1, dB/km < 1.3 < 1.3
Wavelength range, nm 1500 - 1600 1500 - 1600
Core material silica silica
Depressive clad F-doped F-doped
Clad material silica silica
Cutoff wavelength, µm < 1.45 < 1.45
Numerical Aperture (NA) 0.16 ± 0.01 0.16 ± 0.01
∆ n 0.009 ± 0.0005 0.009 ± 0.0005
Short-term bending radius, mm ≥ 10 ≥ 10
Long-term bending radius, mm ≥ 25 ≥ 25
Proof test, kpsi 100 100
Min operating temperature2, C -196 -196
Max operating temperature (short time < 60s), C 300 300
Max operating temperature (long time > 60s), C < 250 < 250
Permissible rate of temperature change in the temperature range, C/min 5 5
1- under normal climatic conditions
2- at the minimum operating temperature, the integrity of the optical fiber is guaranteed
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