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Proceedings Paper

Fiber-to-thin-film coupling through garnet waveguide
Author(s): Alok Kumar Das; Amar K. Ganguly; Alakananda Paul; Dilip K. Paul
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Paper 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.

Paper Details

Date Published: 6 April 1993
PDF: 8 pages
Proc. SPIE 1794, Integrated Optical Circuits II, (6 April 1993); doi: 10.1117/12.141915
Show Author Affiliations
Alok Kumar Das, Jadavpur Univ. (India)
Amar K. Ganguly, Jadavpur Univ. (India)
Alakananda Paul, Howard Univ. (United States)
Dilip K. Paul, COMSAT Labs. (United States)

Published in SPIE Proceedings Vol. 1794:
Integrated Optical Circuits II
Ka-Kha Wong, Editor(s)

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