OPTICAL VENTYLE WITH COMPENSATION OF THERMAL-DEPOSITED DEPOLARIZATION IN A MAGNETIC FIELD Russian patent published in 2017 - IPC G02F1/09 

FIELD: physics.

SUBSTANCE: optical valve with compensation for thermo-induced depolarization in a magnetic field includes a sequentially arranged polarizer, two magneto-optical elements installed inside the magnetic system and non-reciprocally rotating the polarization plane of the transmitted radiation to a total angle of 45°, and the analyzer. In this case, the ratio of the lengths of the magneto-optical elements is determined by the coefficients of linear absorption α₀, thermal conductivity coefficientsκ, thermo-optical characteristics Q, parameters of optical anisotropy of materials ξ, from which they are made, and Verde's constant materials used. The specific values of the lengths of the magneto-optical elements and the direction of the crystallographic axes of the magneto-optical elements are chosen from the conditions for the equality of the nonreciprocal Faraday rotation to 45 degrees and the maximum degree of isolation of the optical valve.

EFFECT: increasing the effective compensation of thermo-induced depolarization in optical valves of lasers with a large average power from 1 to 5 kW with a simpler manufacturing and tuning of the optical valve circuit.

2 cl, 2 dwg