Title :
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
fDate :
2/1/1998 12:00:00 AM
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;
Journal_Title :
Lightwave Technology, Journal of
