Photonic Sensors, Volume. 7, Issue 4, 325(2017)
Short Cavity DFB Fiber Laser Based Vector Hydrophone for Low Frequency Signal Detection
A short cavity distributed feedback (DFB) fiber laser is used for low frequency acoustic signal detection. Three DFB fiber lasers with different central wavelengths are chained together to make three-element vector hydrophone with proper sensitivity enhancement design, which has extensive and significant applications to underwater acoustic monitoring for the national defense, oil, gas exploration, and so on. By wavelength-phase demodulation, the lasing wavelength changes under different frequency signals can be interpreted, and the sensitivity is tested about 33 dB re pm/g. The frequency response range is rather flat from 5 Hz to 300 Hz.sensitivity
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Xiaolei ZHANG, Faxiang ZHANG, Shaodong JIANG, Li MIN, Ming LI, Gangding PENG, Jiasheng NI, Chang WANG. Short Cavity DFB Fiber Laser Based Vector Hydrophone for Low Frequency Signal Detection[J]. Photonic Sensors, 2017, 7(4): 325
Category: Regular
Received: Jul. 24, 2017
Accepted: Aug. 22, 2017
Published Online: Jan. 9, 2018
The Author Email: WANG Chang (bluestone469@hotmail.com)