Circular Polarization-Maintaining Fiber

Circular polarization-maintaining fiber is primarily used as a key sensing element in systems such as fiber-optic current transformers. It features circular polarization-maintaining capability and resistance to environmental disturbances. The fiber is manufactured from a high-birefringence preform with a high-speed spin applied during the drawing process. This specially processed spun fiber has two elliptical-polarization eigenmodes, and its intrinsic birefringence effectively resists stress induced by external conditions (e.g., temperature, bending, vibration), thereby maintaining circular polarization properties. The circular polarization-maintaining fiber not only preserves circularly polarized light, but also exhibits outstanding immunity to environmental interference, ensuring high operational accuracy under temperature fluctuations and vibration.