NDLI: Magneto-Optical Properties of (GdBi)3(FeAl)5O12 Bulk Single Crystals and Their Application to a 1.3 μm Optical Isolator

Content Provider	IEEE Xplore Digital Library
Author	Tamaki, T. Tsushima, K. Kaneda, H.
Copyright Year	1985
Abstract	A compact optical isolator has been developed for use at a wavelength of 1.3 μm, using a Bi-substituted gadolinium iron garnet (Gd_3-xBi_xFe₅O₁₂) single crystal as a Faraday rotator. The optical isolator features a 0.35 dB insertion loss, 34 dB backward loss, and approximately 33.6 dB isolation ratio at 1.3 μm. The insertion loss and the magneto-optical figure of merit in Gd_1·8Bi_1·2Fe₅O₁₂ at 1.3 μ are about 0.025 dB and 3000 deg/dB, respectively. The temperature and magnetic field dependences of the Faraday rotation and the optical absorption have been measured for Gd_3-xBi_xFe_5-yAl_yO₁₂ single crystals, grown by an improved flux method in which Bi₂O₃ is used as a flux. The saturation field of the Faraday rotation decreases with Al substitution. The magneto-optical figure of merit of the Fe³⁺ absorption region at about 0.9 μm was approximately independent of the Al content for y ≪ 0.5. The Faraday rotation in Gd_3-xBi_xFe₅O₁₂ (0.85 ≪ x ≪ 1.2) changes by about 7.5%/50°C as the temperature rises above 25°C.
Starting Page	632
Ending Page	639
Page Count	8
File Size	1578702
File Format	PDF
ISSN	08824959
Volume Number	2
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1987-07-01
Publisher Place	Hiroshima, Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic properties Iron Bismuth Optical saturation Optical losses Isolators Insertion loss Magnetic field measurement Absorption Garnets
Content Type	Text
Resource Type	Article

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