Polarization Maintaining Fibers

Due to the bow-tie design, the polarization of coupled light (488 nm to 1550 nm) remains stable in polarization-maintaining (PM) fibers.

Polyimide-coated PM fibers can withstand temperatures of up to 300°C for long periods of time. For a short period of time, even temperatures of 400°C are not a problem.

The modes of PM telecom fibers correspond to those of standard telecom fibers. Splicing losses are less than 0.1 dB, and the extinction ratio of the polarization is less than -32 dB.

Fiber optic gyroscopes with SAPs in a bow-tie arrangement offer high birefringence and a constant extinction ratio of polarization.

Unlike standard germanium-doped fibers, polarization-maintaining fibers with a quartz glass core do not exhibit a photodarkening effect in short-wave light.

The fiber-based Zing polarizers allow only one polarization state to pass. This is due to the extreme birefringence caused by the bow tie geometry of the core.