基于强度调制的波带片时间透镜研究

Investigation on intensity modulation based temporal zone plate time lens

为了阐明强度调制波带片型时间透镜（时间强度波带片）中心波长、色散补偿量对输出光脉冲消光比、脉冲宽度等性能的影响机理,得到中心波长与焦距色散补偿量的定量理论关系,对时间强度波带片进行了建模和仿真研究。仿真研究结果表明：时间强度波带片的焦距色散补偿量与中心波长在1 310-1 550nm范围呈近似线性关系。对于不同波长,通过拟合公式可以得到焦距色散补偿量以实现最优消光比光脉冲输出。通过时间强度和相位波带片性能对比,讨论了2种波带片型时间透镜在实际应用中的相对优势。研究结论可以为设计和优化时间强度波带片以及拓展新型时间透镜器件的设计和应用提供理论指导和技术参考。

In order to illuminate the influences of central wavelength and dispersion compensation on output pulse extinction ratio （ER） and FWHM of intensity modulation based temporal zone plate （temporal intensity zone plate） , temporal intensity zone plate wasmodeled and investigated by simulation Then, influences of central wavelength on focal length are quantificationally obtained by simulation There is an approximatively linear relationship between the focal length and central wavelength in the range of 1 310-1 550 nm. By our proposed fitting formula, focal length can be calculated and the optimal output pulse ER can be obtained. The comparison of temporal intensity and phase zone plates were achieved, and advantages of the two different zone plate time lenses for practical applications are discussed. The conclusion can provide theoretical guidance and technical reference for the design and optimization of time intensity zone plate, and expanding the novel time lens devices.