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.

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Appl. Opt. (2)

J. Lightwave Technol. (2)

N. Sugimoto, H. Terui, A. Tate, Y. Katoh, Y. Yamada, A. Sugita, A. Shibukawa, and Y. Inoue, "A hybrid integrated waveguide isolator on a silica based planar lightwave circuit," J. Lightwave Technol., vol. 14, pp. 2537-2546, 1996.

E. Anemogiannis and E. N. Glytis, "Multilayer waveguides: Efficient numerical analysis of general structures," J. Lightwave Technol., vol. 10, pp. 1344-1351, 1992.

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