Title :
DFB Fiber Laser Hydrophone With an Acoustic Low-Pass Filter
Author :
Zhang, Faxiang ; Zhang, Wentao ; Li, Fang ; Liu, Yuliang
Author_Institution :
Optoelectron. Syst. Lab., Chinese Acad. of Sci., Beijing, China
Abstract :
A novel distributed-feedback (DFB) fiber laser hydrophone with an acoustic low-pass filter is presented. An aluminous cover with an orifice in the center is used to eliminate high-frequency acoustic components. The acoustic pressure response is theoretically analyzed based on an electro-acoustic method. Two types of hydrophones of this kind have been fabricated and tested. The experimental results over the range of 10 to 2000 Hz are in good agreement with the theoretical expectations.
Keywords :
acousto-optical filters; distributed feedback lasers; fibre lasers; hydrophones; low-pass filters; optical fabrication; optical testing; DFB fiber laser hydrophone; acoustic low-pass filter; acoustic pressure response; distributed-feedback fiber laser; electro-acoustic method; frequency 10 Hz to 2000 Hz; high-frequency acoustic components; Acoustics; Fiber lasers; Low pass filters; Optical fiber sensors; Optical fibers; Resonant frequency; Sonar equipment; Distributed-feedback (DFB) laser; frequency response; hydrophones; low-pass filters;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2159707
