项目名称: 光纤激光传感阵列中的相干坍塌及抑制方法研究
项目编号: No.11304388
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 数理科学和化学
项目作者: 马丽娜
作者单位: 中国人民解放军国防科学技术大学
项目金额: 28万元
中文摘要: 光纤激光传感的突出优势在于能够在一根光纤上集成多个高灵敏度的传感基元,从而构造出可靠性高、体积小、重量轻的超细传感阵列,但阵列的长度和复用容量受到相干坍塌效应的严重制约。本项目针对光纤激光传感阵列中的相干坍塌及其抑制方法展开研究,建立融合了双向瑞利散射、双向光栅反射和有源光纤受激吸收和辐射效应的完善的复合相干坍塌模型,并以此为基础研究抑制光纤激光传感阵列中相干坍塌效应的方法,为降低光纤激光传感阵列的系统噪声、拓展阵列规模提供核心技术支撑。
中文关键词: 相干坍塌;光纤激光传感器;传感器噪声;不对称型光栅;
英文摘要: The most attractive advantage of fiber laser sensing is that a series of sensors can be integrated in a single fiber and thus an ultra thin sensing array with compact structure and low weight can be fabricated. However, the length and maximum number of sensors in an array is limited by the coherent collapse in the array. This proposal is just about researches on the coherent collapse in the fiber laser sensing array .a complex model which considers the dual-direction Reileigh scattering ,the dual-direction grating reflections and the emission and absorption of active fiber will be established, and methods to eliminate this effect will also be researched. The related research results will provide important instructions for reducing the noise and further enlarge the scale of fiber laser sensing array.
英文关键词: coherent collapse;fiber laser sensor;sensor noise;asymmetry grating;