Yasuhara Ryo, Snetkov Ilya, Starobor Alexey, Zheleznov Dmitry, Palashov Oleg, Khazanov Efim, Nozawa Hoshiteru, Yanagitani Takagimi
Opt Lett. 2014 Mar 1;39(5):1145-8. doi: 10.1364/OL.39.001145.
A terbium gallium garnet (TGG) ceramic Faraday rotator (FR) with an isolation ratio of 33 dB was demonstrated at a laser radiation power of 257 W. This FR can be equipped with a large optical aperture by using ceramics technology to prevent laser damage at high-energy pulse operation. The thermal lens of a 257 W laser with a beam diameter of 2.6 mm had a focal length of 9.5 m, which is easily corrected using a spherical lens to suppress the undesirable effects of thermal lensing. The rotation angle of the FR was stabilized by water cooling. The results indicate that the TGG-ceramic-based FR is suitable for high-energy laser systems with high repetition rates.
在257W的激光辐射功率下展示了一种隔离比为33dB的铽镓石榴石（TGG）陶瓷法拉第旋转器（FR）。通过采用陶瓷技术，这种FR能够配备大光学孔径，以防止在高能量脉冲运行时出现激光损伤。光束直径为2.6mm的257W激光器的热透镜焦距为9.5m，使用球面透镜可轻松校正，以抑制热透镜的不良影响。通过水冷使FR的旋转角度稳定。结果表明，基于TGG陶瓷的FR适用于高重复率的高能激光系统。
