Wang Zefeng, Hu Yongming, Meng Zhou, Ni Ming
College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, 410073, China.
Opt Lett. 2008 Jan 1;33(1):37-9. doi: 10.1364/ol.33.000037.
Two Michelson interferometric fiber-optic hydrophones that use panda polarization-maintaining fibers and devices have been constructed and tested. The low-frequency acoustic sensitivities of both hydrophones are -159 dB re 1 rad/microPa. One of the hydrophones tested has a small cylindrical Helmholtz resonator that has a break point near 1200 Hz and a measured roll-off of approximately 50 dB/octave, and it is a hydrostatic-pressure-insensitive design. This hydrophone is a prototype device for a class of sensors that can be used to eliminate aliasing in future sonar systems. To our knowledge, this is the first time that such a fiber-optic hydrophone has been reported.
已经构建并测试了两个使用熊猫保偏光纤及器件的迈克尔逊干涉型光纤水听器。两个水听器的低频声学灵敏度均为相对于1弧度/微帕-159分贝。测试的其中一个水听器带有一个小型圆柱形亥姆霍兹共振器，其在1200赫兹附近有一个断点，测量得到的滚降约为50分贝/倍频程，并且它是一种对静水压力不敏感的设计。这种水听器是一类传感器的原型设备，可用于消除未来声纳系统中的混叠现象。据我们所知，这是首次报道这种光纤水听器。
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