可高效利用光谱资源的高精度高速光谱解调技术研究

项目名称： 可高效利用光谱资源的高精度高速光谱解调技术研究

项目编号： No.61275084

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 王肇颖

作者单位： 天津大学

项目金额： 75万元

中文摘要： 现代智能光纤传感网中的光谱解调技术除了要高速、高精度提取传感数据，还要兼顾网络延拓性和强生存能力，实现光谱资源共享和动态分配。现有技术难以兼顾上述要求。本项目研究高效利用谱资源的高速高精度光解调新方法，特点为：①解调速度成倍提高：用多波长光源的N个梳状谱把采样频带分成N－1段，再由射频电信号驱动电光器件对各段光谱同步扫描采样，解调速度提高N－1倍；②射频电控扫描精度高、重复性好：完全脱离传统的机械扫描，解调精度提高时对器件的要求不升反降；③实时转换光谱数据格式，光谱利用率高：用高速响应的电吸收调制器，将传感子链路采样得到的各帧梳状谱信号，实时转换为单一波长上的时分复用信号，进入网络总线传输，节省出的谱资源由同一总线上其他子链路共享并动态分配。最终实现十几nm波长范围内，以百 kHz光谱扫描频率、亚pm波长分辨率为标志的先进、全面的光解调，迎合传感网光解调方式统一化和谱资源利用智能化的需求。

中文关键词： 光谱解调；分段同步采样；数据格式转换；高精度且高速；智能光纤传感网

英文摘要： In modern intelligent optical-fiber sensor network, spectrum interrogation technology should not only extract sensing data with high speed and high wavelength resolution, but also should be compatible with the extension and survival ability of sensor network. That is to say, the limited spectrum resource should be allocated efficiently and dynamically. Nowadays spectrum interrogation technologies are difficult to meet the three requirements mentioned above at the same time. A new spectrum interrogation technology that can efficiently use spectrum resource with high speed and high wavelength resolution will be studied in this project, which includes: ① The speed of interrogation will be increased by sampling the segmented spectrum synchronously. The spectrum to be sampled is divided into N-1 segments by the N comb wavelengths output by a multiwavelength optical source. The segmented spectrum is then synchronously scanned by an electro-optical component driven by radio frequency signal; ②The resolution and repeatability will be improved by spectrum scanning controlled by radio frequency driven signal. Since optical component is electronically controlled instead of traditional mechanism driven, the system will has good stability and repeatability. Meanwhile the wavelength resolution will be exactly improved while r

英文关键词： interrogation system；synchronously sampling of segmented spectrum；conversion of data format；high resolution and high speed；intelligent fiber sensor network