超连续谱(SC)源在光通信和全光信号处理等领域具有重要的应用。利用硅基光子技术可实现响应快、功耗低、易于集成的高相干、倍频程SC源。因此，研究硅基混合波导中高相干、倍频程SC的产生及其在全光量化与编码方面的应用具有重要意义。本项目拟采用硅基光子特殊结构器件的新原理，研究在硅基混合波导反常色散区中调制不稳定性和噪声对SC相干性的劣化机理，提出基于硅基混合波导的自相似脉冲压缩和高相干、倍频程SC实现的方案；选取合适的波导材料，建立超短脉冲在硅基混合波导中传输的理论模型，设计并优化波导结构，以实现高相干、倍频程SC；基于产生的SC，提出实现全光量化与编码的方案，建立脉冲压缩、SC产生、量化与编码一体化的实验平台。本项目的研究成果将丰富硅基混合波导的非线性理论，为高相干、倍频程SC实现及其在全光量化与编码方面的应用提供新方法和新途径，并将有效地促进可集成的全光信号处理技术与器件的发展。

Supercontinuum (SC) source has significant applications in optical communication and all-optical signal processing. The integrated highly coherent and octave-spanning SC source with fast response time and low power consumption can be achieved with silicon-based photonic technology. Therefore, it has a crucial meaning to investigate the generation of highly coherent and octave-spanning SC in silicon-based hybrid waveguides and its application in all-optical quantization and coding. In this project, with new principle of silicon-based photonic devices with special structure, the degradation mechanism on the SC coherence induced by modulation instability and noise in the anomalous dispersion region of silicon-based hybrid waveguides will be investigated, and the schemes on self-similar pulse compression and highly coherent and octave-spanning SC generation will be proposed. The suitable waveguide materials need to be selected, the theoretical model on the ultrashort pulse propagation in the silicon-based hybrid waveguides will be established, and the waveguide structure will be designed and optimized to achieve highly coherent and octave-spanning SC. Based on the SC generated, all-optical quantization and coding schemes will be proposed, and the integrative experimental platform on the pulse compression, SC generation, and quantization and coding will be established. It is believed that the research findings of this project can enrich the nonlinear theory of silicon-based hybrid waveguides, provide new method and way for highly coherent and octave-spanning SC generation and its application in all-optical quantization and coding, and promote the development of integrated all-optical signal processing technology and device.