633nm All-Fiber Polarization Controller (Strain Type)

The OZ Optics Polarization Controller allows users to convert any input polarization state into any desired output polarization state. The device combines compact size, ease of use with standard volume optical systems, and offers low cost, low loss, and low backreflection. The polarization controller works by applying pressure through an adjustable clamp. The pressure applied to the fiber induces birefringence in the core of the fiber, causing the fiber to act as a quarter-wave plate. Changing the pressure alters the delay between the fast and slow polarization components. Since the clamp is rotatable, the direction of the applied stress can be changed. This enables the achievement of any output polarization. The process is simple and quick, and output polarization exceeding 30 dB can typically be achieved in seconds.