Title :
Passively mode-locked multi-longitudinal mode fiber laser sensor for acoustic pressure measurement
Author :
Shun Wang ; Ping Lu ; Deming Liu
Author_Institution :
Dept. Nat. Eng. Lab. for Next, Generation Internet Access Syst.(NGIA), Huazhong Univ. of Sci. & Technol. (HUST), Wuhan, China
Abstract :
We proposed a fiber laser sensor (FLS) based on passively mode-locked. A polymer membrane is used beneath the pre-strained EDF to convert the sound pressure disturbance into axial strain, then alter the cavity length. Hence acoustic pressure measurement can be carried on by detecting the shift of beat frequency. Experiment results show comparable sound pressure sensitivity 147.2Hz/Pa. The proposed sensor provides an alternative way to detect acoustic pressure and has advantages of good stability and easy to interrogate.
Keywords :
acoustic intensity measurement; acoustic transducers; fibre lasers; fibre optic sensors; frequency measurement; membranes; polymers; FLS; acoustic pressure measurement; axial strain; cavity length; passively mode-locked multilongitudinal mode fiber laser sensor; polymer membrane; pre-strained EDF; sound pressure disturbance conversion; stability; Acoustics; Fiber lasers; Frequency measurement; Laser mode locking; Optical fiber sensors; Optical fibers; Pressure measurement; acoustic pressure sensor; fiber laser sensor; multi-longitudinal mode; passively mode-locked;
Conference_Titel :
Information, Communications and Signal Processing (ICICS) 2013 9th International Conference on
Conference_Location :
Tainan
Print_ISBN :
978-1-4799-0433-4
DOI :
10.1109/ICICS.2013.6782877
