Nonlinear pulse shaping-assisted ultrashort optical pulse generation

An ultrashort optical pulse generator based on nonlinear pulse shaping is proposed and demonstrated. With a spatial light modulator placed prior to a high nonlinearity fiber, (μ+λ)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(\mu +\lambda )$$\end{document}-evolution strategy is introduced to dynamically adjust the transfer function of spatial light modulator both in phase and in amplitude. Nearly chirp-free 2.2-ps optical Gaussian pulse and 0.73-ps optical Nyquist pulse with a repetition rate of 25 GHz are both achieved in simulation. The scheme also has a certain tolerance to phase quantization error of the spatial light modulator and power fluctuation.