全光子晶体光纤单级直接放大产生34W高功率飞秒脉冲

Generation of 34 W High Power Femtosecond Pulses by Single-Stage Direct Amplification in an All-Photonic-Crystal-Fiber Laser System

构建了全保偏双包层掺镱大模场面积光子晶体光纤(LMA-PCF)的单级飞秒激光直接放大系统。光子晶体光纤(PCF)振荡级采用孤子型锁模运转,放大级采用非线性放大技术。该系统获得的高功率飞秒脉冲输出平均功率为34W,脉冲宽度约为50fs,重复频率为42MHz,对应脉冲能量为0.8μJ,峰值功率为16.2MW。

A single-stage femtosecond laser direct amplification system with all polarization-maintaining, double- cladding, Yb-doped large-mode-area photonic crystal fiber （LMA-PCF） is constructed. The photonic crystal fiber （PCF） oscillator operates in soliton mode-locking regime, and the PCF amplifier is employed in nonlinear amplification. The alI-PCF single-stage amplifier directly generates a high-average power of 34 W and a pulse width of 50 fs at the repetition rate of 42 MHz, corresponding to pulse energy of 0.8 μJ and peak power of 16.2 MW.