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Title: High-frequency ultrasonic hydrophone based on a cladding-etched DBR fiber laser
Authors: Shao, L
Lau, ST
Dong, X
Zhang, AP
Chan, HLW 
Tam, HY 
He, S
Issue Date: 15-Apr-2008
Source: IEEE photonics technology letters, 15 Apr. 2008, v. 20, no. 8, p. 548-550
Abstract: Distributed-Bragg-reflector (DBR) fiber-laser-based ultrasonic hydrophone has been found to possess increased detectable frequency range due to the improved sensitivity in the high-frequency region when the fiber cladding thickness was reduced. A wet etching technique is utilized to reduce the fiber diameter of the DBR laser. The peak response frequency moves from 21 to 40 MHz when the fiber diameter was reduced from 125 to 68 µm.
Keywords: Fiber Bragg grating
Fiber laser
Fiber-optic sensor
Ultrasonic hydrophone
Publisher: Institute of Electrical and Electronics Engineers
Journal: IEEE photonics technology letters 
ISSN: 1041-1135
EISSN: 1941-0174
DOI: 10.1109/LPT.2008.918841
Rights: © 2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
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