相位波带片型时间透镜研究

摘要

Based on Opti-System software, temporal phase zone plate lens are deeply researched. The influ⁃ence mechanism of focal length dispersion compensation of temporal phase zone plate lens from central wavelength is confirmed. The relationships of central wavelength, dispersion compensation, output light pulse extinction ratio (ER) and pulse width are established. Research results show that there is an approximate linear relationship be⁃tween focal length dispersion compensation of temporal phase zone plate lens and optical signal central wavelength at 1 310~1 550 nm. Through linear fitting, the linear relationship formula of focal length dispersion compensation and center wavelength is obtained. For input light wave with different wavelength, the optimal focal length disper⁃sion compensation can be determined through the formula to realize the light pulse output with the narrowest pulse width and the best ER. Research results can provide theoretical reference for optimization temporal phase zone plate lens design to broaden the application range of temporal phase zone plate lens.%基于Opti-System软件，对相位波带片型时间透镜进行了深入研究。明确了中心波长对相位波带片型时间透镜焦距色散补偿量的影响机理，建立了中心波长、色散补偿量与输出光脉冲消光比及脉冲宽度间的关系。研究结果表明，相位波带片型时间透镜的焦距色散补偿量，在1310~1550 nm波长范围与光信号中心波长呈近似线性关系。通过线性拟合，得出焦距色散补偿量与中心波长的线性关系公式。对于不同波长的输入光波，可通过公式确定最佳焦距色散补偿量，实现最窄脉宽和最优消光比的光脉冲输出。研究结果可为优化相位波带片型时间透镜设计提供理论指导，进而拓宽相位波带片型时间透镜的应用范围。