全光纤高峰值功率脉冲激光系统

All Fiber High-Peak-Power Pulsed Laser

报道了一种基于大模场光纤级联放大的全光纤高峰值功率纳秒脉冲产生系统。将单模光纤前端系统输出的10ns、100nJ任意整形脉冲输入由芯径15、30、140μm的掺镱大模场光纤级联构成的光纤放大器放大,获得了能量3.2mJ、峰值功率0.3MW的整形纳秒脉冲。研究了该光纤系统极限输出能力,在高斯脉冲注入的情况下实现了光纤系统10ns/7.2mJ/0.7MW高能量和1.16ns/3.7mJ/3.2MW高峰值功率输出。

An all fiber high peak power nanosecond pulsed source based on large mode area （LMA） fiber cascade amplification configuration is presented. 10 ns/100 nJ arbitrarily shaped pulses generated from a single mode fiber （SMF） front end are injected into a LMA fiber cascade amplifier. The amplifier is composed of LMA Yb doped fibers with core diameters of 15, 30 and 140μm. By cascade amplification, shaped nanosecond pulse with 3.2 mJ pulse energy and 0.3 MW peak-power is obtained. The maximum output capacity of the fiber system is further studied. By injecting Gaussian pulse into the fiber amplifier, high energy of 10 ns/7.2 mJ/0.7 MW output and high-peak-power of 1.16 ns/3.7 mJ/3.2 MW output are obtained.