Thermal effects in a high-power laser’s gain medium create predictable axially symmetric temperature gradients. Temperature gradients generate mechanical stresses in pumped crystal, which lead to induced birefringence.
Generated optical anisotropy causes significant power losses if a laser system contains polarization-sensitive elements (eg Brewster plates, Faraday rotators).
We offer a solution to solve the depolarization issue – a depolarization compensator.
ADVANTAGES VS. ALTERNATIVES
Workshop of Photonics | WOP, in a joint effort with Ekspla Ltd., based on Ekspla Ltd invention EP3712664 (A1), developed and verified a solution to solve the depolarization issue – an optical element that compensates distortion of original polarization in the gain medium.
Due to the unique properties of precisely point-by-point inscribed nano-gratings, the depolarization compensator is flexible and versatile, and it can be widely adjusted according to customer needs.
Depolarization compensator. Left: Two-dimensional distribution map of the orientation of fast and slow axes. Right: Retardance profile.