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Proceedings Paper

Development of an integrated optical microphone by means of waveguide structuring on PMMA
Author(s): D. Garthe; Juergen Kobiela; Renate Kallweit
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Paper Abstract

The paper describes the development of an optical microphone on an integrated-optical basis. The applied modulation principle is based on the change of the coupling ratio between two butt-coupled optical waveguides induced by lateral displacement of the guides. The coupling beam is first directed to a reflective membrane before being coupled into the receiving waveguide, allowing the membrane movement to be detected in a non-contact manner. The necessary waveguide structure is contained in an integrated-optical chip. This chip was produced with the aid of a technique based on the polymer PMMA, specially developed for this purpose. The necessary change of the refractive index was generated by means of a photochemical method. The coupling performance of the chips is largely in agreement with the theoretical values.

Paper Details

Date Published: 19 November 1993
PDF: 12 pages
Proc. SPIE 1985, Physical Concepts and Materials for Novel Optoelectronic Device Applications II, (19 November 1993); doi: 10.1117/12.162733
Show Author Affiliations
D. Garthe, Technische Hochschule Darmstadt (Germany)
Juergen Kobiela, Technische Hochschule Darmstadt (Germany)
Renate Kallweit, Forschungsinstitut der Deutschen Bundespost Telekom (Germany)

Published in SPIE Proceedings Vol. 1985:
Physical Concepts and Materials for Novel Optoelectronic Device Applications II
Fabio Beltram; Erich Gornik, Editor(s)

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