High Precision and Lockable Manual Polarization Rotator/Controller

SKU: POCM

The Manual Mini Polarization Controller is based on a novel design featuring high precision, ultra-compact size, low loss, high extinction, and lockability. Unlike conventional fiber strain-based polarization controllers, the POCM contains three rotatable waveplates between a pair of collimators to provide all possible polarization states with high precision and repeatability. Rotation is accomplished by using a finger or a screwdriver and locking in position via a magnet. Once the polarization positions are selected, they can be locked in position without drift for years. The conventional strain-based polarization controller changes over time. It is designed for modules or systems with limited space.
Each plate’s orientation will define the polarization transformation:
○  First Half-Wave Plate: Rotates the initial polarization angle.
○  Quarter-Wave Plate: Converts linearly polarized light into elliptical or circular polarization.
○  Second Half-Wave Plate: Further rotates the polarization angle to reach the desired output state.
To adjust the wave plates to achieve the desired polarization state
●  Initial Setup: Align the wave plates such that the first half-wave plate is at 0°, the quarter-wave plate is at 45°, and the second half-wave plate is at 0°.
●  Fine-Tuning: Rotate each wave plate individually to adjust the polarization state at the output. Adjustments allow you to cover a full range of states:
○  Rotate the first λ/2 plate to set the initial linear polarization angle.
○  Rotate the λ/4 plate to introduce elliptical or circular polarization.
○  Rotate the second λ/2 plate to achieve the final desired linear polarization angle.