SINGLE CRYSTAL, PROCESS FOR PRODUCING SAME, OPTICAL ISOLATOR, AND OPTICAL PROCESSOR USING SAME

(19)

(11)

EP 2 492 379 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	published in accordance with Art. 153(4) EPC

(15)	Correction information:
	Corrected version no 1 (W1 A1)

(48)	Corrigendum issued on:
	24.10.2012 Bulletin 2012/43

(43)	Date of publication:
	29.08.2012 Bulletin 2012/35

(21)	Application number: 10824951.7

(22)	Date of filing: 20.10.2010

(51)

International Patent Classification (IPC):

C30B 29/28^(2006.01)

G02B 27/28^(2006.01)

(86)	International application number:
	PCT/JP2010/068422

(87)	International publication number:
	WO 2011/049102 (28.04.2011 Gazette 2011/17)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)

Priority:

21.10.2009 JP 2009242433

(71)	Applicants:
	Fujikura Ltd. Tokyo 135-8512 (JP) National Institute for Materials Science Ibaraki 305-0047 (JP)

(72)	Inventors:
	SANADA Kazuo Tokyo 135-8512 (JP) SHIMAMURA Kiyoshi Tsukuba-shi Ibaraki 305-0047 (JP) GARCIA Villora Encarnacion Antonia Tsukuba-shi Ibaraki 305-0047 (JP)

(74)	Representative: HOFFMANN EITLE
	Patent- und Rechtsanwälte Arabellastrasse 4 81925 München 81925 München (DE)

(54)	SINGLE CRYSTAL, PROCESS FOR PRODUCING SAME, OPTICAL ISOLATOR, AND OPTICAL PROCESSOR USING SAME

(57) The present invention provides a single crystal for an optical isolator having a Faraday rotation angle exceeding that of TGG single crystal in a wavelength region of 1064 nm or longer or in a wavelength region of shorter than 1064 nm, and is capable of realizing enlargement of crystal size, a production process thereof, an optical isolator, and an optical processor that uses the optical isolator. The single crystal according to the present invention is composed of a terbium aluminum garnet single crystal, and mainly a portion of the aluminum is replaced with lutetium.