Paramagnetic garnet-based transparent ceramic and method for producing same

Abstract

A sintered body of Tb-containing rare earth aluminum garnet represented by formula (1) ( Tb 1 - x - y ⁢ Y x ⁢ Sc y ) 3 ⁢ ( Al 1 - z ⁢ Sc z ) 5 ⁢ O 12 ( 1 ) (where 0<x<0.45, 0<y≤0.1, and 0.004<z<0.2), wherein: |a−b|≤10.1 when at least 900 nm<λ<1,100 nm, where, in terms of a total light transmittance spectrum on an optical path length of 24 mm, a % is the total light transmittance at the wavelength 900 nm and b % is the total light transmittance at any wavelength λ more to the long-wavelength side than 900 nm; and no thermal lensing effect is produced even with respect to a 100-W laser output, allowing for use as a Faraday rotator of a high-power fiber laser.

Dependencies are inferred from the claim text.