Title :
DFB Fiber Laser Hydrophone With Flat Frequency Response and Enhanced Acoustic Pressure Sensitivity
Author :
Ma, Lina ; Hu, Yongming ; Luo, Hong ; Hu, Zhengliang
Author_Institution :
Coll. of Optoelectron. Sci. & Technol., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
In this letter, we present a promising distributed-feedback fiber laser hydrophone with a novel mounting structure. The acoustic pressure sensitivity is enhanced up to 102.77 dB re Hz/Pa and a flattened frequency response is achieved with a fluctuation of less than plusmn1.5 dB within 2.5 kHz. The maximum and minimum detectable acoustic signals are also analyzed to investigate the hydrophone dynamic range.
Keywords :
acoustic signal detection; acousto-optical devices; distributed feedback lasers; fibre lasers; fibre optic sensors; frequency response; hydrophones; measurement by laser beam; DFB fiber laser hydrophone; acoustic pressure sensitivity; acoustic signal detection; frequency response; Acoustic pressure sensitivity; distributed- feedback (DFB) fiber lasers; dynamic range; frequency response; optical fiber hydrophones;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2009.2026180
