一种全光纤啁啾脉冲放大系统设计

Design of All-Fiber Chirped Pulse Amplification System

提出了一种全光纤啁啾脉冲放大系统,在理论分析的基础上,利用分步傅里叶法,通过求解非线性薛定谔方程,对由组合A(1m的DCF+2m的EDF+3.08m的SMF)与组合B(1m的DCF+2m的LMA-EDF+0.61m的SMF)分别构成的两个全光纤啁啾脉冲放大系统进行分段数值模拟,结果发现,将重复频率为100MHz、峰值功率为33.3 W、脉宽为300fs的种子脉冲经过组合A构成的放大系统后,变为重复频率为100 MHz、峰值功率为18 062.43 W、脉宽约为56fs的脉冲;而经过组合B构成的放大系统后,种子脉冲则变为重复频率为100 MHz、峰值功率为31 022.24 W、脉宽约为50fs的脉冲。

A kind of all-fiber chirped pulse amplification system is proposed.On the basis of theoretical analysis,the nonlinear Schrdinger Equation is solved by using the distribution of Fourier method.Two all-fiber chirped pulse amplification systems based on combination of A(1m-DCF+2m-EDF+3.08m-SMF)and combination of B(1m-DCF+2m-LMA-EDF+0.61m-SMF)are segmented and numerically simulated,respectively.The results show that,after amplification system consisting of combination A,seed pulse with repetition rate 100 MHz,peak power 33.3Wand pulse width 300 fs,becomes pulse with repetition rate 100 MHz,peak power 18 062.43 W and pulse width about 56 fs.But after amplification system consisting of combination B,the seed pulse becomes pulse with repetition rate 100 MHz,peak power 31 022.24 Wand pulse width about 50 fs.