Title :
High-Frequency Ultrasonic Hydrophone Based on a Cladding-Etched DBR Fiber Laser
Author :
Shao, Li-Yang ; Lau, Sien-Ting ; Dong, Xinyong ; Zhang, A. Ping ; Chan, H.L.W. ; Tam, H.Y. ; He, Sailing
Author_Institution :
Zhejiang Univ., Hangzhou
fDate :
4/15/2008 12:00:00 AM
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 m.
Keywords :
distributed Bragg reflector lasers; fibre lasers; DBR fiber laser; cladding etched; high frequency; ultrasonic hydrophone; Distributed Bragg reflectors; Fiber lasers; Frequency; Optical fiber polarization; Optical fiber sensors; Optical films; Optical interferometry; Optical sensors; Sonar equipment; Ultrasonic imaging; Fiber Bragg grating; fiber laser; fiber-optic sensor; ultrasonic hydrophone;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.918841
