Analysis and design of a novel leaky YIG film guided wave optical isolator

Author

Priye, Vishnu ; Pal, Bishnu P. ; Thyagarajan, K.

Author_Institution

Dept. of Phys., Indian Inst. of Technol., New Delhi, India

Volume

16

Issue

2

fYear

1998

fDate

2/1/1998 12:00:00 AM

Firstpage

246

Lastpage

250

Abstract

A guided wave optical isolator using a four layered leaky yttrium iron garnet (YIG) waveguide with a YIG guiding layer is proposed and analyzed through a transfer matrix formulation. The dependence of isolation characteristics on different waveguide parameters are discussed. It is shown that for four layered structures an isolation ratio of about 24 dB can be achieved with YIG films having large gyrotropy. It is also shown that by replacing the single guiding YIG film with multilayers of YIG with compensated walls and proper permittivity, high isolation ratio can be achieved even with currently available YIG films having low gyrotropy

Keywords

garnets; matrix algebra; optical communication equipment; optical design techniques; optical isolators; optical rotation; optical waveguides; permittivity; yttrium compounds; YFe5O12; YIG; YIG guiding layer; four layered leaky yttrium iron garnet waveguide; high isolation ratio; isolation characteristics; isolation ratio; large gyrotropy; leaky YIG film guided wave optical isolator; low gyrotropy; permittivity; single guiding YIG film; transfer matrix formulation; waveguide parameters; Garnets; Gyrotropism; Iron; Isolators; Nonhomogeneous media; Optical design; Optical films; Optical waveguides; Transmission line matrix methods; Yttrium;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.661017

Filename

661017