Paramagnetic garnet-type transparent ceramic, magneto-optical device, and production method for paramagnetic garnet-type transparent ceramic
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsTakuto Matsumoto, Masanori Ikari, Keita Tanaka
Life of this patent
Estimating the term…
Abstract
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. ( T b 1 - x - y Y x S c y ) 3 ( Al 1 - z Sc z ) 5 O 12 ( 1 ) ( In the formula , 0 ≤ x < 0.45 , 0 ≤ y < 0.08 , 0 ≤ z < 0.2 , and 0.001 < y + z < 0.2 . )
Claims5
A paramagnetic garnet type transparent ceramic material which is a sintered body of Tb-containing rare earth aluminum garnet having the formula (1):
- (
- T
-
- b
- 1
- -
- x
- -
- y
-
- Y
- x
-
- S
-
- c
- y
- )
- 3
-
- (
- Al
- 1
- -
- z
-
- Sc
- z
- )
- 5
-
- O
- 12
- (
- 1
- )
- wherein 0.199≤x<0.45, 0≤y<0.08, 0≤z<0.2, and 0.001<y+z<0.20,
- wherein the paramagnetic garnet type transparent ceramic material has an average sintered grain size of from 10 μm to 40 μm, and in the form of a sample of 20 mm long has an insertion loss of up to 0.05 dB at wavelength 1,064 nm in an optical effective region in its longitudinal direction.
Dependencies are inferred from the claim text.