| 简介 |
A paramagnetic garnet-type transparent ceramic that exhibits a high laser damage threshold, said ceramic being a sintered body of a Tb-containing rare earth-aluminum garnet represented by formula (1), and being characterized in that the average sintered grain size is 10-40 µm, and the insertion loss at a wavelength of 1, 064 nm in the optically effective region along the length direction of a 20 mm-long sample is 0.05 dB or less. Formula (1) : (Tb1-x-yYxScy)3(Al1-zScz)5O12 (In the formula, 0≤x<0.45, 0≤y<0.08, 0≤z<0.2, and 0.001
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