应用于拖曳细线阵的光纤水听器研究  

Fiber Optic Hydrophone Used for Thin Line Towed Array

作　　者：运朝青[1] 罗洪[1] 胡正良[1] 胡永明[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,湖南长沙410073

出　　处：《光学学报》2012年第12期77-81,共5页Acta Optica Sinica

摘　　要：研制了一种直径为13mm的空气腔推挽式双臂对称补偿结构的光纤水听器,介绍了该光纤水听器的工作原理,优化设计了光纤水听器结构。在小直径情况下,保证了较高的声压灵敏度,同时获得了较低的加速度灵敏度。实验测得在80～2500Hz频段内,该光纤水听器的平均声压灵敏度为-142.5dB,灵敏度的起伏小于±0.8dB,加速度灵敏度小于-20dB。实验结果表明,研制的空气腔推挽式双臂对称补偿结构的光纤水听器,能很好地满足拖曳细线阵的使用要求。A type of fiber optic hydrophone used in thin line towed array is presented. The fiber optic hydrophone, with a diameter of 13 mm, based on air-backed push-pull double armed symmetrical compensated structure is developed. Moreover, the working principle of the fiber optic hydrophone is introduced, and an optimized design structure of the fiber optic hydrophone is proposed. In the case of small diameter of the fiber optic hydrophone, the higher acoustic-pressure sensitivity is ensured, and the lower acceleration sensitivity is obtained simultaneously. Over the frequency ranging from 80 Hz to 2500 Hz, the average acoustic-pressure sensitivity of the fiber optic hydrophone is -- 142.5 dB with undulation of 0.8 dB, Experimental results show that the fiber optic hydrophone while the acceleration sensitivity is less than --20 dB. can well meet requirements for the use of thin line towed arrays.

关 键 词：传感器 光纤水听器 加速度灵敏度 流噪声 声压灵敏度 拖曳细线阵 

分 类 号：TN29[电子电信—物理电子学]