芯轴式干涉型光纤水听器深海探头的研制

Development of Deep-Sea Detector of the Mandrel Interferometric Optical Fiber Hydrophone

随着国家海洋战略的逐步推进,光纤水听器的深海应用已成为必然趋势。基于芯轴式干涉型光纤传感技术研制了光纤水听器深海探头,对芯轴式干涉型光纤水听器深海探头的设计思路进行了阐述。该深海探头样品的声学性能和耐静水压性能测试结果表明,所设计的深海探头在5 000 m海深下能够保持约-140 dBrad/μPa的声压灵敏度。

With deploying of the national marine stratagem gradually, the deep-sea application of optical fiber hydrophones has become an inevitable trend. An optical fiber hydrophone deep-sea detector based on the mandrel interferometric optical fiber sensing technology is developed. The design of the deep-sea detector of the mandrel interferometric fiber-optic hydrophone is described. The experimental results of acoustic performance and its hydrostatic pressure dependency of the deep-sea detector samples show that the designed detector can maintain a acoustic pressure sensitivity of about-140 dBrad/μPa at 5 000 m depth.