信息安全涉及国家安全、经济发展和社会稳定，因此光混沌保密通信作为一种新型信息安全技术近年来倍受关注。就光混沌保密通信的研究现状而言，单信道的码率只有几个Gb/s且很少使用波分复用(WDM)技术，显然无法满足通信容量日益增长的需求。因此，提高信道的传输码率并融合WDM技术是光混沌通信未来发展的必然趋势，其中波长大范围可调、带宽可控的宽带混沌信号获取技术则是需要攻克的核心技术环节。基于此，本项目拟采用弱谐振腔法布里-珀罗半导体激光器(WRC-FPLD)，探索波长在40nm范围内可调、带宽可控的宽带混沌信号产生方法和技术实现方案；在此基础上，通过选择合适的信息加载、传输和解码方式，构建WDM混沌保密通信系统，以实现信息在该系统中的双向、高速、长距离保密传输。通过本项目的实施，可望在WDM光混沌保密通信的若干关键技术上取得一些突破，从而推动我国信息安全体系的自主构建。

Information security is related to national security, economic development and social stability, so the optical chaotic secure communication as a new type of information security technology has attracted more and more attention in recent years. At present, for optical chaotic secure communication, the rate of single channel is only a few Gb/s and the wavelength division multiplexing (WDM) technique is rarely used, which is clearly unable to meet the growing demand for communication capacity. Therefore, it is an inevitable trend for the future development of optical chaotic communication to improve the transmission rate and use the WDM technology, where the generation of broadband chaotic carrier with wavelength tunability and bandwidth controllability is a core technique needed to be overcome. Based on above considerations, the project intends to explore the generating method and technology scheme of wideband chaotic signal with tunable wavelength in the range of 40nm and bandwidth controllability by adopting weak-resonant-cavity Fabry-Perot laser diode (WRC-FPLD). As a result, by selecting appropriate information loading, transmission and decoding methods, we will construct a WDM chaotic secure communication system to realize high-speed long-distance bidirectional secure transmission of information. Through the implementation of this project, it is expected to make some breakthroughs in some key technologies of WDM optical chaotic secure communication, which will be helpful to promote the self-construction of information security system in our country.