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Proceedings Paper

Fiber optic strain sensing with phase-shifting interferometric techniques
Author(s): Li-Horng Shyu; Yeh-Fen Fu; Jen-yu Shieh
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Paper Abstract

We present the performance of a sensor with an optical fiber strain gauge. The system adopts a phase-shifting technique with an equal phase shifting modulation to determine the strain on the sensor. It is accomplished by applying a triangle-wave-modulated signal to the injection current of a visible laser diode with precision temperature control, and its demodulation technique employs a digital signal processing (DSP) to calculate the phase of strain and a statistic processing to improve the signal-to-noise ratio. The experiments show that the relation between the optical phase difference and the external strain is linear.

Paper Details

Date Published: 24 September 1996
PDF: 6 pages
Proc. SPIE 2895, Fiber Optic Sensors V, (24 September 1996); doi: 10.1117/12.252149
Show Author Affiliations
Li-Horng Shyu, National Yunlin Polytechnic Institute (Taiwan)
Yeh-Fen Fu, China Junior College of Industrial and Commercial Management (Taiwan)
Jen-yu Shieh, National Yunlin Polytechnic Institute (Taiwan)

Published in SPIE Proceedings Vol. 2895:
Fiber Optic Sensors V
Kim D. Bennett; Byoung Yoon Kim; Yanbiao Liao, Editor(s)

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