高功率光载微波脉冲的产生及其大气中相位噪声特性的研究

项目名称： 高功率光载微波脉冲的产生及其大气中相位噪声特性的研究

项目编号： No.61275053

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： 杨苏辉

作者单位： 北京理工大学

项目金额： 82万元

中文摘要： 光载微波（optically carried microwave signal）是近年来出现在光电子学领域的一个新概念，其实质是光波上加载了频率在微波波段的信号。由于光载微波兼具光波的传输特性及微波的频域特性，在计量学，非线性光学，太赫兹光学，光谱学，高分辨率雷达等领域有着广泛的潜在应用。本申请提出应用激光方法产生高功率光载微波脉冲信号，拟在半导体激光泵浦单块非平面环形腔及耦合腔固体激光器两种结构中，分别引入双折射机制实现同源相干双频激光振荡，利用半导体泵浦光纤功率放大器对脉冲双频激光信号进行功率放大，连续运转下得到不小于10瓦的光载微波信号。采用被动调Q机制实现双频脉冲激光输出，脉冲峰值功率10千瓦以上。定量研究光载微波信号的相位噪声特性和抗大气干扰能力，旨在为光载微波这一交叉学科的新概念在高分辨率成像探测及遥感系统中的应用打好技术基础。

中文关键词： 光载微波；光纤放大；注入锁定；抗干扰；测距测速

英文摘要： Rf/microwave photonic technologies have received intense interest due to their applications in high resolution lidar, wireless communications, terahertz generation，and metrology. Nevertheless, most of the efforts are put to generate low power rf/microwave optical signal with large frequency difference, power scaling of rf/microwave signal has not received enough attentions. However, high power rf/microwave optical signals are needed for many applications such as lidar, remote sensing and long-range transmission of rf high-purity references in free space optical communications. Moreover, the knowledge of phase noise features of an optical carried rf/microwave signal in atmosphere is also essential for such applications. We propose to study and develop dual-frequency pulsed lasers and fiber power amplifiers as well as investigate the phase noise features of the optically carried rf/microwave signals. The objectives of this project are to achieve high power optically carried microwave signal up to ten watts in CW mode and 10 KW peak power in pulsed mode. In addition, theoretical modeling and quantitative descriptions about the phase noise of an optically carried microwave signal in atmosphere will also be studied. We propose to implement the dual frequency laser with two approaches, the first approach is a dual-fr

英文关键词： dual frequency；injection seeding；fiber power amplification；dual frequency lidar；atmospheric turbulence