Title:
FARADAY ROTATOR
Document Type and Number:
WIPO Patent Application WO/2015/037332
Kind Code:
A1
Abstract:
[Problem] To provide a Faraday rotator which is capable of preventing the degradation of the isolation function in an optical isolator even when the rotator is used in a high-powered laser having a wavelength of 1.1 µm or less and a power of 1 W or more, and which can be produced with high efficiency.
[Solution] The Faraday rotator is constituted by: a nonmagnetic garnet substrate (4); a bismuth-substituted rare earth iron garnet film (1) grown by a liquid phase epitaxial method on both surfaces of the nonmagnetic garnet substrate; and a heat radiating sapphire crystal substrate (2) adhered to each surface of the bismuth-substituted rare earth iron garnet film. The absorption coefficient of the bismuth-substituted rare earth iron garnet film with respect to light having a wavelength of 1.06 µm is 9 cm-1 or less, and the difference in film thickness between the bismuth-substituted rare earth iron garnet films grown on both surfaces of the nonmagnetic garnet substrate is 10 µm or less.
Inventors:
NAKAMURA NOBUO (JP)
Application Number:
PCT/JP2014/069302
Publication Date:
March 19, 2015
Filing Date:
July 22, 2014
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
G02B27/28; G02F1/09
Foreign References:
| JP2010134066A | 2010-06-17 | |||
| JP2012188303A | 2012-10-04 | |||
| JP2011090291A | 2011-05-06 | |||
| JP2010150116A | 2010-07-08 | |||
| JP2000066160A | 2000-03-03 | |||
| JP2006215491A | 2006-08-17 |
Other References:
See also references of EP 3045957A4
Attorney, Agent or Firm:
UEDA, SHOZO (JP)
Ueda Shozo (JP)
Ueda Shozo (JP)
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