Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/404
Title: Ultrasonic hydrophone based on distributed Bragg reflector fiber laser
Authors: Guan, Bai-ou
Tam, Hwa-yaw
Lau, Sien Ting
Chan, Helen L. W.
Subjects: Acoustic sensor
Bragg grating
Fiber laser
Hydrophone
Optical fiber transducers
Issue Date: Jan-2005
Publisher: IEEE
Source: IEEE photonics technology letters, Jan. 2005, v. 16, no. 1, p. 169-171
Abstract: We demonstrate a novel fiber-optic hydrophone that uses a dual polarization distributed Bragg reflector (DBR) fiber laser as sensing element. The operation principle is based on the modulation of the birefringence of the fiber laser by high-frequency ultrasound. By measuring the amplitude and frequency of the sidebands as well as the polarization beat frequency of the output of the fiber laser using a photodetector and a radio-frequency spectrum analyzer, the amplitude and frequency of the acoustic pressure, and temperature can be determined simultaneously. The DBR fiber laser hydrophone has a linear response to acoustic pressure and can detect acoustic frequency up to at least 40 MHz.
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Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/404
DOI: 10.1109/LPT.2004.838141
ISSN: 1041-1135
Appears in Collections:AP Journal/Magazine Articles
EE Journal/Magazine Articles

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