Short Cavity DFB Fiber Laser Based Vector Hydrophone for Low Frequency Signal Detection

• 来源期刊: 光子传感器（英文版）
• 关键词: Short cavity distributed feedback fiber laser vector hydrophone frequency response phase noise sensitivity
• 年，卷（期）: 2017,（4）
• 页码范围: 325-328
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s13320-017-0453-x

摘要

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 300Hz.