首页|Thermo-optical properties of cryogenically cooled (Tb0.9Y0.1)(2)O-3 ceramics
Thermo-optical properties of cryogenically cooled (Tb0.9Y0.1)(2)O-3 ceramics
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NSTL
Elsevier
Due to a high Verdet constant and paramagnetic properties, the ceramics based on terbium oxide is a promising candidate as a magneto-optical medium for developing cryogenic Faraday isolators. Cryogenic cooling suppresses thermal effects and leads to an increase in the maximum power of the laser radiation passing through the Faraday isolator at the same isolation ratio. We have measured the thermally-induced depolarization and the thermal lens within the 81-297 K temperature range and the linear absorption coefficient alpha(0) within the 83-297 K temperature range in (Tb0.9Y0.1)(2)O-3. The ratio of the effective thermooptical constants P-eff/Q(eff) was similar to 6.44 in the studied temperature region. On cooling to LN2 temperature, the parameters alpha(0)Q(eff)/kappa and alpha P-0(eff)/kappa (kappa is the thermal conductivity coefficient) decreased by a factor of similar to 5.2. The alpha(0) was temperature independent. The results of the study demonstrate great prospects for the use of terbium oxide based ceramics in cryogenic Faraday isolators.
NSTL
Elsevier
