CAJ | 학술논문

本文利用一种具有半圃形极化畴结构的PPLN晶体,在慢变振幅近似条件下,基于二阶非线性效应并考虑到控制光和信号光简并二渡耦合时周期性极化铌酸锂波导内的耦合模方程,用数值方法对小信号时相位失配情况下的全光开关特性进行了研究,分析了由于光栅周期、晶体温度和控制光波长变化引起的相位失配对输出的信号光功率的影响,并给出了输出信号光功率与控制光功率之闻的关系曲线.发现在相位失配的情况下增大控制光的功率可以达到信号光的关断,具有较好的开关特性.
본문이용일충구유반포형겁화주결구적PPLN정체,재만변진폭근사조건하,기우이계비선성효응병고필도공제광화신호광간병이도우합시주기성겁화니산리파도내적우합모방정,용수치방법대소신호시상위실배정황하적전광개관특성진행료연구,분석료유우광책주기、정체온도화공제광파장변화인기적상위실배대수출적신호광공솔적영향,병급출료수출신호광공솔여공제광공솔지문적관계곡선.발현재상위실배적정황하증대공제광적공솔가이체도신호광적관단,구유교호적개관특성.
The characterization of all -optical switching is analyzed theoretically based on cascaded second- order nonlinear and degenerate two - wave mixing in the periodically poled LiNbO3 (PPLN) waveguide with homocentrically semicircle domain structure. The coupled equa-tions are given that describe the evolution of electric fields through the media derived from the slowly varying envelope approximation. Based on solving the couple mode equations numerically,the dependence of the signal power on the gate power is given under different phase mis-match conditions such as the grating period, the crystal temperature and the gate wavelength. The all-optical switching has better characteris-tic.