Fiber-to-thin-film coupling through garnet waveguide

Alok Kumar Das; Amar K. Ganguly; Alakananda Paul; Dilip K. Paul

doi:10.1117/12.141915

6 April 1993 Fiber-to-thin-film coupling through garnet waveguide

Alok Kumar Das, Amar K. Ganguly, Alakananda Paul, Dilip K. Paul

Proceedings Volume 1794, Integrated Optical Circuits II; (1993) https://doi.org/10.1117/12.141915
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

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.

Citation Download Citation

Alok Kumar Das, Amar K. Ganguly, Alakananda Paul, and Dilip K. Paul "Fiber-to-thin-film coupling through garnet waveguide", Proc. SPIE 1794, Integrated Optical Circuits II, (6 April 1993); https://doi.org/10.1117/12.141915

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