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Optical Engineering

Wavelength insensitive fiber optic sensor based on an axially strained fused coupler
Author(s): Andre Booysen; Pieter L. Swart; Beatrys M. Lacquet; Stephanus J. Spammer
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Paper Abstract

A wavelength insensitive fiber optic strain sensor configuration is presented. It consists of two variable ratio couplers in series: a reference and a sensing element. Difference-over-sum processing yields linear outputs that are insensitive to fluctuations in optical intensity. By subtracting the reference from the sensor output, wavelength compensation is achieved. The wavelength properties of this sensor were determined experimentally and the results compared to computer simulations. Theoretical and experimental results show good agreement. The compensation technique is suitable for any variable ratio coupler sensor and is not limited to axially strained fused tapered couplers.

Paper Details

Date Published: 1 October 1996
PDF: 5 pages
Opt. Eng. 35(10) doi: 10.1117/1.600961
Published in: Optical Engineering Volume 35, Issue 10
Show Author Affiliations
Andre Booysen, Rand Afrikaans Univ. (South Africa)
Pieter L. Swart, Rand Afrikaans Univ. (South Africa)
Beatrys M. Lacquet, Rand Afrikaans Univ. (South Africa)
Stephanus J. Spammer, Rand Afrikaans Univ. (United States)


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