Permanent magnet-based guided-wave magnetooptic Bragg cell modules

Author

Wang, C.L. ; Pu, Y. ; Tsai, C.S.

Author_Institution

Dept. of Electr. & Comput. Eng., California Univ., Irvine, CA, USA

Volume

10

Issue

5

fYear

1992

fDate

5/1/1992 12:00:00 AM

Firstpage

644

Lastpage

648

Abstract

Compact magnetostatic forward volume wave-based guided-wave magnetooptic (MO) Bragg cell modules have been realized by utilizing a pair of small samarium-cobalt permanent magnets together with a pair of current-carrying coils. A highly uniform DC magnetic field, has been obtained in the air gap where yttrium iron garnet-gadolinium gallium garnet (YIG-GdGG) waveguide samples are inserted. A tunable DC magnetic field as large as 2446 Oe corresponding to a tunable carrier frequency band of 6.85 GHz has been achieved. The resulting MO Bragg cell modules, at the optical wavelength of 1.303 μm, with carrier frequencies ranging from 2.0 to 12.0 GHz have provided performance characteristics comparable to those obtained by using a bulk electromagnet. Compact MO Bragg cell modules have potential applications, such as scanning, switching of light beams, and real-time processing of wide-band microwave signals without requiring frequency down-conversion

Keywords

gadolinium compounds; garnets; integrated optics; magneto-optical devices; optical waveguides; yttrium compounds; 1.303 micron; 2 to 12 GHz; 6.85 GHz; IR; Sm-Co; YFe5O12-GdGa5O12; YIG-GdGG; air gap; current-carrying coils; highly uniform DC magnetic field; light beams; magnet-based guided-wave magnetooptic Bragg cell modules; magnetostatic forward volume wave-based guided-wave; performance characteristics; permanent magnets; real-time processing; scanning; switching; tunable DC magnetic field; tunable carrier frequency band; waveguide samples; wide-band microwave signals; Coils; Frequency; Garnets; Iron; Magnetic fields; Magnetostatic waves; Optical waveguides; Permanent magnets; Waveguide discontinuities; Yttrium;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.136100

Filename

136100