Terbium gallium garnet ceramic Faraday rotator for high-power laser application

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 le...

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Bibliographic Details
Published inOptics letters Vol. 39; no. 5; p. 1145
Main Authors Yasuhara, Ryo, Snetkov, Ilya, Starobor, Alexey, Zheleznov, Dmitry, Palashov, Oleg, Khazanov, Efim, Nozawa, Hoshiteru, Yanagitani, Takagimi
Format Journal Article
LanguageEnglish
Published United States 01.03.2014
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Summary: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.
ISSN:1539-4794
DOI:10.1364/ol.39.001145