基于集成半导体激光器的光子射频交换系统实现方法研究

微波光子转发器是满足下一代高频宽带、在轨可重构、点波束多用户通信卫星的关键核心器件，光子射频交换系统单元的集成化、小型化、可扩展性能将直接影响有效通信载荷的体积、重量、功耗性能。本项目针对卫星通信、升空平台、无人机中继通信等应急通信/战场机动通信应用场景，研究单片集成半导体激光器的光波/微波转换机理，包括光注入锁定、四波混频、单周期振荡等激光非线性效应的动力学特性，研究基于集成半导体激光器非线性效应的微波光子变频方法和波长转换器方法。为了克服传统光子变频器件电光系数小、半波电压高、波导尺寸大的问题，和半导体光放大器波长转换器工作电流大、耦合封装困难的可扩展集成化瓶颈，项目聚焦半导体激光器的单片集成技术，预期突破激光器非线性动态特性的增强与精准调控关键科学问题，突破宽带可扩展微波光子变频转发与交换的集成方法关键科学问题，为实现星上转发器宽带化、可扩展和集成化、小型化提供创新。

Microwave Photonics transponder will be the core payload for next generation communication satellite with requirements of high frequency, wideband, on obit reconfigurable, multiple beams for multi-users access. The characters of photonics RF(radio frequency) switching system such as integration, miniaturization, easy to expand will directly lead to the SWaP (size, weight and power) performance of the effective communication payload. .In this proposal, emergency as well as battlefield communication scenarios such as satellite communication, launch platform and UAV relay communication will be targeted. The monolithic integrated laser diode will be studied especially for the conversion mechanism between lightwave and microwave, which including the laser nonlinearity dynamics phenomena as optical injection, four wave mixing, and period one oscillation. Microwave photonics frequency transferring method as well as wavelength conversion method will be studied, which are all based on those nonlinearity effects in a integrated semiconductor laser diode..In order to overcome the problems of small electro-optical coefficient, high Vpi voltage and large waveguide size of the traditional photonic frequency converter, as well as the bottleneck of expandable integration with large working current and difficult coupling packaging of the semiconductor optical amplifier( SOA )wavelength converter, monolithic integrated semiconductor laser diode will be focused in this proposal..It is expected to break through the key scientific problems of enhancement of nonlinear dynamic characteristics of laser and precise regulation, to break through the key scientific problems of the integration method of wideband expandable microwave photon frequency conversion forwarding and switching, and to provide the innovative structure, realization method and key technology for the realization of wideband, expansion, integration and miniaturization of on-board transponder.