飞秒光脉冲光纤放大增益特性的实验研究

Experimental Study of the Amplification of Femtosecond Laser Pulses in Fiber Amplifier

报道了掺 Er3 + 光纤激光器输出 1.531μm波长飞秒激光脉冲增益放大的实验研究结果。将自起振相加脉冲锁模掺 Er3 + 光纤激光器输出的飞秒激光脉冲注入掺 Er3 + 光纤放大器中进行放大 ,分别采用正向和逆向抽运的方式 ,得到了最高放大倍数 55倍 (17.4 d B)和 6 4倍 (18.1d B)的增益 ,对应的最大单脉冲能量 (峰值功率 )分别为 0 .384 n J(752 W)和 0 .4 52 n J(12 95W) ,脉冲重复率为 2 0 .84 MHz。正向和逆向抽运放大后输出的最短激光脉宽分别为 50 1fs和 30

The Experimental results of amplification of 1.531 μm femtosecond laser pulses using Er 3+ doped fiber amplifier is reported. The femtosecond pulses generated by a self starting additive pulses mode locked Er 3+ fiber laser with pulse duration of 410 fs injected into the Er 3+ doped fiber amplifier (6 m, high doping concentration Er 3+ doped fiber), the maximum amplification gain of 55(17.4 dB) and 64.4(18.1 dB) and the maximum single pulse energy (peak power) of 0.384 nJ(752 W) and 0.452 nJ (1295 W) have been obtained with forward and backward pumping respectively. The shortest output pulses duration are 501 fs and 309 fs with forward and backward pumping respectively.