Yasuhara Ryo, Nozawa Hoshiteru, Yanagitani Takagimi, Motokoshi Shinji, Kawanaka Junji
Opt Express. 2013 Dec 16;21(25):31443-52. doi: 10.1364/OE.21.031443.
The temperature dependence of the thermo-optic effects in single crystal and ceramic TGG were evaluated by using the Fizou interferometer method. The temperature dependence of the refractive index and thermal expansion are significantly improved at low temperature for both ceramics and single crystals. Our estimation using a figure of merit indicated that a TGG ceramics cooled to liquid nitrogen temperature can reduce thermal wave-front distortion by a factor of up to 4.7 with respect to that at 300 K, and can reduce thermal birefringence effects by up to a factor of 12 with respect to those at 300 K.
采用菲佐干涉仪法评估了单晶和陶瓷钆镓石榴石（TGG）中热光效应的温度依赖性。对于陶瓷和单晶而言，在低温下折射率和热膨胀的温度依赖性均得到显著改善。我们使用品质因数进行的估算表明，冷却至液氮温度的TGG陶瓷相对于300 K时可将热波前畸变降低多达4.7倍，并且相对于300 K时可将热双折射效应降低多达12倍。
