Fiber-to-thin-film coupling through garnet waveguide

Details Fiber-to-thin-film coupling through garnet waveguide Fiber-to-thin-film coupling through garnet waveguide

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.1794..460d&link_type=abstract

Proc. SPIE Vol. 1794, p. 460-467, Integrated Optical Circuits II, Ka-Kha Wong; Ed.

Physics

Scientific paper

An effective method of coupling optical signal from single mode fiber to thin film waveguide applicable to integrated optical (IO) devices is shown. The technique uses a coupling waveguide of garnet material. The matching of propagation constants between thin film and garnet material is achieved by controlling the thickness of the thin film waveguide. Mismatching of propagation constants due to variation of film thickness along the propagation length and its refractive index variation are considered in the analysis of coupled power. Polymer, co-polymer and polymerized solgel solution are used for the IO waveguide devices. Different structures of thin films are shown. Conditions for improving the optical power coupling efficiency will also be discussed.

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