Abstract
Thermal lens in zinc selenide (ZnSe), cadmium selenide (CdSe) and zinc sulfphide (ZnS) magnetooptical media was investigated by phase-shifting interferometry. It was shown that the thermal lens in ZnSe is 10 times weaker and in ZnS and CdSe are 2 and 16 times higher than in popular magnetooptical terbium gallium garnet crystal. The focal shift and thermo-optical characteristics and of magneto-optical figure of merit were determined. The obtained values of absorption coefficient 1.1х10−4 cm−1 allowed determining a record, 4 kW maximum operating power of a ZnSe Faraday isolator.
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