FIELD: physics; optics.
SUBSTANCE: present invention pertains to measuring techniques. A magneto-optical rotator of an optical isolator, fitted in the magnetic field of a magnetic system, is located in a thermostat with provision for maintaining a given low temperature value in the rotator, so as to reduce heat release. If the magneto-optical rotator is made from paramagnetic material whose Verdet constant ν, increases with decrease in temperature T° according to the law ν˜1/T°, the linear dimensions of the magneto-optical rotator can be considerably reduced.
EFFECT: provision for degree of insulation of over 20 dB.
5 cl, 3 dwg
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