Design Of High Power Ultrashort Pulse All-Optical Regeneration And Shaping System

With the rapid development of ultrashort pulse technology,its application fields are becoming more and more extensive.At the same time,there is an increasing demand for pulse quality for ultrashort pulses.In this paper,the all-optical regeneration and shaping system for high-power ultra-short pulses applied in normal dispersion region of 1 micron wavelength is designed by using the regeneration method of Mamyshev regenerator in the traditional communication system.It can reduce amplitude jitter,suppress bottom noise and reduce time-domain jitter to improve pulse quality.The specific work content is as follows:(1)The nonlinear broadening and self-similar evolution of high peak power optical pulse in optical fiber transmission are analyzed and calculated by solving the nonlinear Schrodinger equation numerically.The mathematical model of all-optical regenerative shaping system for ultrashort pulse is established.(2)Two kinds of all-optical regenerative shaping systems--one system based on"fiber self-phase modulation plus offset central wavelength filtering" and the other system based on "self-similar evolution plus offset central wavelength filtering" are designed respectively in the case of a large normal dispersion system at 1 ?m wave band.The models of these two systems are built and simulated.(3)By studying the input and output power transfer functions of two types of regenerative systems under different parameters,the influence of each parameter of the regenerator on the input and output amplitude characteristics of the system is analyzed.Two kinds of regeneration systems with ideal transfer functions are successfully designed and optimized.The first system achieves suppression of noise and suppression of amplitude jitter,and the second system achieves suppression of noise and linear amplification.(4)The time jitter characteristics of two kinds of regeneration systems are studied and analyzed.The two-stage cascade regeneration system is designed and optimized which can suppress the time jitter successfully.