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Title: An economical piezoelectric phase modulator for fiber optic sensors
Authors: Lau, KS
Wong, KH
Chan, TL
Yeung, SK
Issue Date: 1-Dec-1996
Publisher: Optical Society of America
Source: Applied optics, 1 Dec. 1996, v. 35, no. 34, p. 6836-6838 How to cite?
Journal: Applied optics 
Abstract: A homemade piezoelectric phase modulator for interferometric fiber optic sensors was fabricated using piezoelectric buzzers as strain elements. Six piezoelectric elements were embedded between the two halves of a bakelite cylinder split along its axis and secured tightly together again to form a cylinder. Single-mode optical fiber was then wound around the cylinder to complete the unit. Up to a frequency of 500 Hz, the phase shift produced by the modulator is linearly proportional to the amplitude of the applied voltage. The sensitivity of the phase modulator is about 3.6 rad/V and has a dynamic range of 1,000 rad, which is sufficient for most phase modulation purposes.
ISSN: 0003-6935
DOI: 10.1364/AO.35.006836
Rights: © 1996 Optical Society of America. This paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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