Polarization Fiber
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iXblue Photonics has announced a highly birefringent polarization fiber targeting high-volume production of compact fiber-optic gyroscopes operating at 1550 nm.
The fiber features a beath length of 0.9 mm at 633 nm, offering high Polarization Extinction Ration for fiber-optic gyro coils, even with a small radius of <30 mm. This record birefringence has no impact on the other key optical specifications as attenuation, mode field diameter, and numerical aperture remain the same to ensure low loss and excellent coupling under bent configuration.
Fiber optic gyroscope manufacturers are able to produce tiny coils while keeping a good polarization extinction ratio over operational temperature range. The external coating diameter is reduced to 128 µm for an 80-µm clad fiber, helping further to reduce the outside size of coils and limit the Shupe effect.
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https://www.photonics.com/Buyers_Guide/Exail/c11665
Photonics Spectra
Jun 2021