Measuring the Faraday Effect
High birefringence (HiBi) spun fibers are produced by twisting polarization-maintaining bow-tie fibers during the drawing process. This maintains the circular polarization of the light. Stress birefringence caused by vibrations or thermal influences cannot cause signal loss or drifts in these fibers.
Even long spun fibers can be wound with small diameters. Such coils are used, for example, to measure the Faraday effect or in other polarimetric sensors.
