宽带硅纳米波导相位敏感光参量放大器的机理与技术研究

Optical amplifiers are key devices used in a wide range of applications such as optical communications, optical information processing, photon detection and sensing. The demand of highly integrated optical amplifiers with wider gain bandwidth, higher gain level, and lower noise figure in optical communication system and optical computing system has become more and more urgent due to the rapid development of Optical information technology. The mechanism and technology for phase sensitive optical parametric amplifiers (PSOPA) with broadband, higher gain and lower noise figure based on four-wave mixing in silicon nano-waveguide will be investigated in this project. Firstly, the physical mechanism of silicon nano-waveguide frequency non-degenerate PSOPA pumped by picoseconds pulse should be systematically investigated in theory, and the theoretical model of silicon nano-waveguide PSOPA should be built. Moreover, the highly integrated silicon nano-waveguide PSOPA with wider gain bandwidth will be investigated experimentally. The novel silicon nano-waveguides designed by ourselves can be used to realize some key technologies, such as phase locked for the pump, signal and idler, and relative phase tuning, and realize PSOPA ultimately. The study of this project is of great significance, which will provide novel optical amplifiers with micro-nano scale for applied research areas including integrated optics, all optical information processing, optical communication and optical computing, promote the rapid development of those areas, and develop the nonlinear silicon photonics.

光放大器是光通信、光信息处理、光子探测及传感等应用领域的关键器件。随着光信息技术的迅速发展，光通信系统和光计算系统对具有更宽的增益带宽、更高的增益水平、更低的噪声指数以及更高集成度的光放大器的需求越来越迫切。本项目研究基于硅纳米波导中四波混频效应的宽带、高增益、低噪声指数相位敏感光参量放大器的机理与技术。首先，从理论上系统地研究硅纳米波导频率非简并相位敏感光参量放大器的物理机制，并建立皮秒脉冲泵浦的硅纳米波导相位敏感光参量放大器的理论模型。其次，从实验上研究通信波段高集成度的宽带硅纳米波导相位敏感光参量放大器，利用自行设计的新型硅纳米波导实现泵浦光、信号光和闲频光的相位锁定、相对相位调控等关键技术，并最终实现相位敏感光参量放大。本项目研究将为集成光学、全光信息处理、光通信和光计算等应用研究领域提供新型微纳光放大器，并促进这些领域的快速发展，同时发展非线性硅光子学理论，研究意义重大。

宽带硅纳米波导相位敏感光参量放大器在光通信、光信号处理、光子探测及传感领域具有重大的应用价值，为实现具有更宽的增益带宽、更高增益水平、更低噪声指数以及更高集成度的光放大器的研究提供了一种新的技术手段。本项目开展了硅基波导中基于四波混频效应的相位敏感光参量放大器理论和实验研究，发展建立了基于硅波导的相位敏感光参量放大器的理论模型，理论研究了基于宽度可调硅波导的频率非简并相位敏感光参量放大技术；理论研究了硅波导中基于相位敏感光参量放大的相位压缩技术；理论研究了基于硅有机混合波导的全光波长转换技术；理论研究了基于氢化非晶硅波导中四波混频效应的中红外全光波长转换技术；理论研究了基于硅光子晶体波导中四波混频效应的时域成像技术；实验证明了跑道型硅基微环谐振腔中低功率连续光泵浦的全光波长转换技术；实验研究了硅波导中皮秒脉冲泵浦的全光波长转换技术；本项目的研究结果为硅光子技术应用于集成光学、全光信号处理等领域的创新发展提供了关键理论和技术基础。