Innovative improvements in bismuth-doped rare-earth iron garnet Faraday rotators

Author

Fratello, Vincent J. ; Licht, Steven J. ; Brandle, C. David

Author_Institution

Lucent Technol. Bell Lab., Murray Hill, NJ, USA

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

4102

Lastpage

4107

Abstract

Performance of magneto-optic isolators is often limited by the properties of the Faraday rotator, which can be improved. (1) A compensation point layer can be used to control the temperature dependence of the material and consequently improve the extinction ratio to ⩾30 dB from -10°C to 85°C without significant increase in device size or complexity. (2) Variation of composition and lattice parameter can decrease the material absorption and therefore the device insertion loss at specific wavelengths. (3) Development of a “latching” Faraday rotator material with an effective coercivity above 1 kOe allows the design of devices with no bias magnet and consequently lower cost and size

Keywords

Faraday effect; bismuth compounds; garnets; magneto-optical isolators; -10 to 85 C; BiJkFe5O12; Faraday rotator; absorption; bismuth-doped rare-earth iron garnet; coercivity; compensation point layer; composition; extinction ratio; insertion loss; latching material; lattice parameter; magneto-optic isolator; temperature dependence; Composite materials; Garnets; Iron; Isolators; Magnetic materials; Magnetic properties; Magnetooptic devices; Magnetooptic effects; Performance loss; Size control;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.539312

Filename

539312