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| 高灵敏度加速度抵消型分布反馈有源光纤光栅水听器研究 | |
| 引用本文： | 李东明,陈军,葛辉良,张自丽. 高灵敏度加速度抵消型分布反馈有源光纤光栅水听器研究[J]. 中国激光, 2012, 39(3): 305005-145 |
| 作者姓名： | 李东明 陈军 葛辉良 张自丽 |
| 作者单位： | 李东明:浙江大学现代光学仪器国家重点实验室， 浙江 杭州 310027杭州应用声学研究所， 浙江 杭州 310012 陈军:浙江大学现代光学仪器国家重点实验室， 浙江 杭州 310027 葛辉良:杭州应用声学研究所， 浙江 杭州 310012 张自丽:杭州应用声学研究所， 浙江 杭州 310012 |
| 基金项目： | 声纳科技重点实验室基金(9140C2401080802)资助课题。 |
| 摘 要： | 研究了高灵敏度抗加速度型分布反馈(DFB)有源光纤光栅水听器。采用λ/4相移型掺铒光纤光栅构成DFB激光器,输出窄线宽激光,利用弹性膜片增敏方法封装有源光纤布拉格光栅,构成了高灵敏度有源光纤光栅水听器,并以两边对称的弹性膜片构成封装结构来抵消轴向加速度干扰,提高水听器在运动情况下的检测能力,并通过对结构的优化大大提高了光纤光栅水听器的耐静水压能力。研究结果表明水听器在100～1000Hz频率范围内声-相位灵敏度达到-132.7±0.7dB(0dB=1rad/μPa),加速度灵敏度可做到-20dB(0dB=1rad/g)以下,耐静水压可达2MPa。 |
| 关 键 词： | 光纤光学 光纤布拉格光栅 分布式反馈光纤激光 水听器 增敏 |
| 收稿时间： | 2011-11-14 |
Research of High Sensitivity and Anti-Acceleration of DFB Active Fiber Grating Hydrophone |
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| Li Dongming,Chen Jun,Ge Huiliang,Zhang Zili. Research of High Sensitivity and Anti-Acceleration of DFB Active Fiber Grating Hydrophone[J]. Chinese Journal of Lasers, 2012, 39(3): 305005-145 | |
| Authors: | Li Dongming Chen Jun Ge Huiliang Zhang Zili |
| Affiliation: | 1State Key Laboratory of Modern Optical Instrumentation,Zhejiang University,Hangzhou,Zhejiang 310027,China 2Hangzhou Applied Acoustics Institute,Hangzhou,Zhejiang 310012,China) |
| Abstract: | The active fiber grating hydrophone with high sensitivity and anti-acceleration is investigated. The λ/4 phase-shift Er3+-doped fiber grating is used as a distributed feedback Bragg (DFB) narrow linewidth laser. Casing this active fiber Bragg grating (FBG) element with the elastic slice to enhance sensitivity the high sensitivity hydrophone sensor is constructed. Afterward, the ability of the detection to hydrophone motion is enhanced by using the both sides symmetrical elastic slices to encapsnlate the disturber of the axile acceleration. And then, the capability of resisthy resting water pressure is promoted via strustural optimization. In a frequency range of 100~1000 Hz the sound-phase sensitivity reached -132.7±0.7 dB (0 dB=1 rad/μPa). The acceleration sensitivity is under -20 dB (0 dB=1 rad/g). The resisting resting water pressure capability is up-to 2 MPa. |
| Keywords: | fiber optics fiber Bragg grating distributed feedback Bragg fiber laser hydrophone sensitivity enhancement |
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