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Proceedings Paper

Effective light coupling in reflective fiber optic distance sensors using a double-clad fiber
Author(s): Stefan Werzinger; Lisa Härteis; Aaron Köhler; Rainer Engelbrecht; Bernhard Schmauss
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Paper Abstract

Many fiber optic distance sensors use a reflective configuration, where a light beam is launched from an optical fiber, reflected from a target and coupled back into the fiber. While singlemode fibers (SMF) provide low-loss, high-performance components and a well-defined output beam, the coupling of the reflected light into the SMF is very sensitive to mechanical misalignments and scattering at the reflecting target. In this paper we use a double-clad fiber (DCF) and a DCF coupler to obtain an enhanced multimodal coupling of reflected light into the fiber. Increased power levels and robustness are achieved compared to a pure SMF configuration.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032391 (23 April 2017); doi: 10.1117/12.2267478
Show Author Affiliations
Stefan Werzinger, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Lisa Härteis, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Aaron Köhler, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Rainer Engelbrecht, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Technische Hochschule Nürnberg Georg Simon Ohm (Germany)
Bernhard Schmauss, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)

Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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