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, µm6.8 ± 0.59.1 ± 0.5
Mode field diameter (Gauss), µm7.5 ± 0.510 ± 0.5
Clad diameter, µm125 ± 1125 ± 1
Coating diameter, µm155 ± 5155 ± 5
Fiber typeSingle modeSingle mode
Coating materialPolyimidePolyimide
Cladding offset, %< 2< 2
Coating offset, %< 5< 5
Attenuation at 1550 nm1, dB/km< 1.3< 1.3
Wavelength range, nm1500 - 16001500 - 1600
Core materialsilicasilica
Depressive cladF-dopedF-doped
Clad materialsilicasilica
Cutoff wavelength, µm< 1.45< 1.45
Numerical Aperture (NA)0.16 ± 0.010.16 ± 0.01
∆ n0.009 ± 0.00050.009 ± 0.0005
Short-term bending radius, mm≥ 10≥ 10
Long-term bending radius, mm≥ 25≥ 25
Proof test, kpsi100100
Min operating temperature2, C-196-196
Max operating temperature (short time < 60s), C300300
Max operating temperature (long time > 60s), C< 250< 250
Permissible rate of temperature change in the temperature range, C/min55
1- under normal climatic conditions
2- at the minimum operating temperature, the integrity of the optical fiber is guaranteed
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