海底光纤水听声呐光学系统的研究

发布时间：2018-05-02 15:46

本文选题：光纤水听声呐 + 干涉　；参考：《长春理工大学》2014年硕士论文

【摘要】：光纤水听声呐由于其探测灵敏度高,动态范围大,稳定性极高,耐高温,抗腐蚀,体积小,重量轻,传输距离远,可利用光纤传感复用技术,构成大面积和大规模阵列等优势,在水听传感领域将有着不可替代的作用,但是光纤水听器的发展明显落后于压电水听器,因此在应用上受到了很大的限制。目前,我国的光纤水听器还处于理论和实验阶段,这就导致要获得稳定的、高灵敏度的光纤水听器更加困难。本论文主要是对光纤水听器的光学系统进行研究。分别对光纤干涉水听传感原理和光纤光栅水听传感原理进行了详细的分析和研究,同时也对光纤水听器的主要关键技术进行了介绍。论文中分别设计和搭建了三套光纤水听声呐传感实验系统,其中包括基于3×3耦合器的Fox-Smith干涉式光纤水听传感系统、光纤FBG匹配光栅解调光纤水听传感系统和光纤FBG光栅非平衡M-Z解调光纤水听传感系统,然后利用上述实验系统分别进行水中的扰动实验,并对得到的实验现象进行对比分析,选取了适于本实验系统的传感解调光学系统。
[Abstract]:Because of its high detection sensitivity, large dynamic range, high stability, high temperature resistance, corrosion resistance, small volume, light weight, long transmission distance, fiber optic sensing multiplexing technology can be used to form large area and large scale array. It will play an irreplaceable role in the field of water sensing, but the development of fiber-optic hydrophone lags behind that of piezoelectric hydrophone, so it is limited in application. At present, the fiber-optic hydrophone in our country is still in the theoretical and experimental stage, which makes it more difficult to obtain a stable, high-sensitivity fiber-optic hydrophone. In this thesis, the optical system of fiber-optic hydrophone is studied. The principle of fiber-optic interferometric sensing and the principle of fiber Bragg grating (FBG) sensing are analyzed and studied in detail, and the main key technologies of fiber-optic hydrophone are also introduced. In this paper, three sets of fiber optic sonar sensing systems are designed and built, including the Fox-Smith interferometric sensing system based on 3 脳 3 coupler. The fiber FBG matching grating demodulates the fiber optic sound sensing system and the fiber FBG grating non-balanced M-Z demodulation optical fiber sound sensing system. Then the disturbance experiments in water are carried out using the above experimental system, and the experimental phenomena obtained are compared and analyzed. The sensing demodulation optical system suitable for this experiment system is selected.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB565.1

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