光参量放大脉冲发生器中色散效应的研究  

The Study of the Dispersion Effect on Pulse Generation with Fiber Optical Parametric Amplification

作　　者：王哲[1] 李齐良[1] 丰昀[1] 

机构地区：[1]杭州电子科技大学通信工程学院通信与信息系研究所,杭州310018

出　　处：《电子器件》2013年第6期793-796,共4页Chinese Journal of Electron Devices

基　　金：浙江省自然科学基金项目(Y1110078)

摘　　要：走离效应对参量放大脉冲发生器具有重大影响,群速度色散将使脉冲展宽。采用分步傅里叶法对耦合方程求解,分析了利用参量放大器产生脉冲的过程中色散效应的影响。依照所设定参数的仿真结果表明:输入泵浦波的调制频率为1 GHz时,走离效应、群速度色散的影响几乎可以忽略;调制频率增加到20 GHz,光纤中的群速度色散可以缓解由于泵浦波、闲频波之间的走离效应导致的脉冲畸变;而随着调制频率的继续增大到100 GHz,色散效应和走离效应将使得产生的脉冲受到严重恶化。The walk-off effect has significant influence on the pulse generation with fiber optical parametric amplmer （FOPA）. Pulses can be broadened due to the effect of grope-velocity dispersion. One uses the split-step Fourier method to solve the solutions of the nonlinear couple-mode equations by considering the effect of group-velocity dis- persion. According to the setup parameters, simulation results show that the effects of walk-off and dispersion have little influence on pulses when the modulation frequency of input pump wave is 1 GHz; as the pulse repetition rate increases to 20 GHz, the pulse deterioration caused by the walk-off effect between pump and idler wave can be mitigated due to the group-velocity dispersion ;when the modulation frequency is 100 GHz,the generated pulses will be deteriorated seriously as a result of the dispersion effect and walk-off effect.

关 键 词：参量放大器 脉冲 走离效应 群速度色散 

分 类 号：TN253[电子电信—物理电子学]