Transparent Tb2Ti2O7 ceramics for use in Faraday isolators
I.L. Snetkov,
K.V. Sidorenko,
O.V. Palashov,
Lixuan Zhang,
Jiang Li
Affiliations
I.L. Snetkov
Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, 46 Uljanov Str., 603950, Nizhny Novgorod, Russia; Corresponding author.
K.V. Sidorenko
Physicotechnical Research Institute, Lobachevsky State University of Nizhny Novgorod, Pr. Gagarina 23, K. 3, Nizhni Novgorod, 603950, Russia
O.V. Palashov
Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, 46 Uljanov Str., 603950, Nizhny Novgorod, Russia
Lixuan Zhang
Transparent Ceramics Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201899, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
Jiang Li
Transparent Ceramics Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201899, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
Magneto-optical and thermo-optical characteristics of transparent Tb2Ti2O7 ceramics were investigated. The dependence of the index of refraction on the wavelength in the 0.29–2 μm range, the wavelength and temperature dependence of the Verdet constant, as well as the dependence of thermally induced depolarization on laser radiation power were measured. The value of the Verdet constant in Tb2Ti2O7 surpasses that in Tb3Ga5O12 by more than 1.68 times. The thermo-optical characteristic Qeff was estimated to be (1.8–3.7)∙10−8 1/K, which is record small compared to Qeff of the known magneto-optical materials. The small value of Qeff makes Tb2Ti2O7 a highly promising magneto-optical material for Faraday isolators and rotators for high average power lasers.
