Fiber Polarization Controller – 0.5dB Loss, 2Hz, USB

SKU: FPOL

The FPOL series All-Fiber Polarization Controllers use four independently stepper motor-driven fiber loop paddles to function as rotatable waveplates, enabling full-range polarization control. Constructed from a single continuous fiber strand, the design ensures ultra-low insertion loss and high optical power handling. Each fiber loop applies controlled stress and rotation — leveraging birefringence modulation and geometric phase effects (including Sagnac-like mechanisms) — to alter the polarization state of light. This all-fiber approach is inherently broadband and affects all wavelengths transmitted through the fiber, although with some wavelength dependence in birefringence response. The FPOL system is suitable for use as a polarization scrambler or a polarization controller. When combined with an automatic control circuit and a polarimeter, it can transform any input polarization state into a defined output state on the Poincaré sphere with high precision and repeatability. The system features a user-friendly GUI accessible via RS232, a wall-pluggable DC power supply, and supports high-power, connectorized fiber configurations. Custom software options and a Python command set are available for advanced integration and control.