带空气腔芯轴型光纤水听器特性研究  

A Fiber-Optic Air-Backed Mandrel Hydrophone

作　　者：王利威[1] 殷锴[1] 张敏[1] 廖延彪[1] 

机构地区：[1]清华大学电子工程系光纤传感实验室,北京100084

出　　处：《光子学报》2009年第1期107-111,共5页Acta Photonica Sinica

基　　金：国家863高技术研究与发展计划子课题(2003AA602110-1)资助

摘　　要：对带空气腔芯轴型光纤水听器进行了研究和试验验证.分别建立了二维和三维模型对水听器性能进行分析,给出了两种模型下的水听器相移灵敏度计算公式;小批量制作了22个该结构的水听器并进行了测试.试验数据与模型计算结果十分吻合.结果表明,三维模型计算结果比二维模型更为准确,频带内均方根偏差大部分都小于0.3(dB.re.rad)/μPa.试验采用的水听器相移灵敏度为-153(dB.re.rad)/μPa,其归一化相移灵敏度达到-308(dB.re.1)/μPa.同时,该模型可以更好地根据实际需要来设计不同尺寸和性能的水听器结构.An optical-fiber air-backed mandrel hydrophone was proposed and investigated both analytically and experimentally. The two-dimensional and three-dimensional quazistatically theoretical models of the hydrophone were created and compared,and the phase sensitivity of the hydrophone was analyzed. Twentytwo hydrophones of this type according to the model presented were constructed and tested. The experiment results show that the estimation of theoretical models are correct, and estimation accuracy of three-dimensional model is better than that of two-dimensional model. The phase sensitivity achieves -- 153 （dB·re·rad）/μPa,the normal phase sensitivity achieves --308（dB·re·1）/μPa. The hydrophone is easy to construct at low cost with simple structure, and some new type of it with the required performances could be designed according to the model presented.

关 键 词：光纤水听器 空气腔 芯轴型 相移灵敏度 

分 类 号：TN247[电子电信—物理电子学]