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| 基于微分干涉原理的全光纤水下侦听技术 |
| Submarine listening based on fiber differential interferometer |
| 投稿时间：2013-09-26 |
| DOI：10.3969/j.issn.1005-5630.2014.02.004 |
| 中文关键词: 水下侦听 光纤 微分干涉 传感器 |
| 英文关键词:submarine listening fiber differential interference sensor |
| 基金项目:973课题（2010CB327805）；科技部科技支撑计划课题（2011BAF06B01）；国家重大科学仪器专项项目（2012YQ150213）；国家自然科学基金项目（61107077）；上海市科委科研计划项目（11231203400） |
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| 中文摘要: |
| 针对水下安防这个特殊领域，介绍了一种基于微分干涉原理的全光纤水下声音传感系统。系统光路采用改进的Sagnac结构，利用宽光谱光源，实现了以相位压缩原理为基础的微分干涉，相较传统干涉结构，本系统基于干涉光束共光路的特性，只响应振动等动态变化的物理量，自动屏蔽温度起伏等静态、准静态干扰因素，使其在保持传统光学干涉类传感器高灵敏性的同时，又克服了传统干涉类传感器不稳定的缺点。该系统的水下部分仅由光纤及其无源器件组成，适应水下长期工作环境。实验验证了该方法可行、有效。 |
| 英文摘要: |
| Submarine security is a special field. A submarine listening system based on fiber differential interferometer is introduced in this paper. Because of a modified sagnac interferometer and a broadband source, its optical system is a differential interferometer depending on the principle of phase compression. Based on the common-optical path interferometer, this system only responds on dynamic disturbance such as vibration, and neglects static or quasi-static parameters such as temperature fluctuation. This system not only has the high-sensitivity of traditional interferometric sensors, but also overcomes the instability of them, which tends to be affected from the external environmental condition such as temperature fluctuation. The underwater part of this system is fiber and passive optical components, which fits the long-term works in submarine condition. At last, the experimental results verify the feasibility of the system. |
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