J4 ›› 2013, Vol. 26 ›› Issue (4): 46-50.doi: 10.3976/j.issn.1002-4026.2013.04.011

• 论文 • 上一篇    下一篇

一种响应平坦的宽带高灵敏度分布反馈光纤激光水听器

徐华,王昌,彭纲定,张晓磊,王英英,孙志慧,祁海峰,宋志强,倪家升   

  1. 1山东省光纤传感技术重点实验室,山东省科学院激光研究所,山东 济南 250014;2 新南威尔士大学,澳大利亚 悉尼 2052
  • 收稿日期:2013-03-28 出版日期:2013-08-20 发布日期:2013-08-20
  • 作者简介:徐华(1951-),男,研究员,研究方向为光纤传感与激光技术研究。Email:xuhua2338375@163com
  • 基金资助:

    国际科技合作项目(2012DFA10730);山东省自主创新成果转化重大专项(2011ZHZX1A0107);国家自然科学基金(61205083);山东省自然科学基金(ZR2012FQ002)

A distributed feedback fiber laser hydrophone with high sensitivity and flat frequency response

 XU Hua, WANG Chang, PENG Gang-Ding, ZHANG Xiao-Lei, WANG Ying-Ying, SUN Zhi-Hui, QI Hai-Feng, SONG Zhi-Qiang, NI Jia-Sheng   

  1. 1. Shandong Provincial Key Laboratory of Fiber Sensing Technology, Laser Institute, Shandong Academyof Sciences, Jinan 250014, China; 2. University of New South Wales, Sydney 2052, Australia
  • Received:2013-03-28 Online:2013-08-20 Published:2013-08-20

摘要:

      采用聚氨酯材料制作的梭形结构对分布反馈(DFB)光纤激光器进行封装,在驻波管校准声场对其进行测试,由OPD4000相位解调仪精确测量光纤激光水听器的相移量。 通过测试和数据分析,得到1 kHz处DFB光纤激光水听器的相位-声压灵敏度为-122.6 dB re rad/μPa,相当于3.8 nm/MPa; 在10 Hz~10 kHz整个频段内频响曲线非常平坦,波动小于±9 dB,并且信噪比与标准压电水听器相当。

关键词: 分布反馈光纤激光水听器, 频响, 声压灵敏度

Abstract:

     A distributed feedback (DFB) fiber laser is packaged with a polyurethane spindle structure for acoustic sensing. It is tested in a standing wave tube calibration field. Phase demodulator OPD4000 is employed to precisely measure the phase shift. We obtain the phase sensitivity of -122.6 dB re rad/μPa, i.e. 3.8 nm/MPa at 1 kHz. The frequency response is flat in the range of 10 Hz~10 kHz with the fluctuation of no more than ±9 dB. Its signal and noise ratio (SNR) is equal to standard PZT hydrophone.

Key words: distributed feedback fiber laser hydrophone, frequency response, acoustic sensitivity

中图分类号: 

  • TP212.1