具有近衍射极限光束质量的240瓦高平均功率方形纳秒全光纤集成激光器。

240 W high-average-power square-shaped nanosecond all-fiber-integrated laser with near diffraction-limited beam quality.

作者信息

Yu Hailong, Tao Rumao, Wang Xiaolin, Zhou Pu, Chen Jinbao

出版信息

Appl Opt. 2014 Oct 1;53(28):6409-13. doi: 10.1364/AO.53.006409.

DOI:10.1364/AO.53.006409

Abstract

We report an all-fiber-integrated high-average-power square-shaped nanosecond pulse laser operating at 1068 nm based on the master oscillator power amplifier configuration. The seed source is a passively mode-locked Yb-doped fiber laser with fundamental cavity repetition rate of 1.86 MHz. Output pulses with a square shape can be tuned in pulse width from 271 ps to the nanosecond level. The average output power reaches to 9.21 W after three preamplifiers. Finally, a main amplifier is developed to boost the average output power to 240 W, and the corresponding pulse energy and peak power are ∼ 129.3 μJ and 36 kW, respectively. The efficiency of the main amplifier is ∼ 61.3%, and the beam quality represented by M(2) factors is below 1.3 and 1.2 in the X and Y directions.

摘要

我们报道了一种基于主振荡功率放大器配置、工作在1068nm的全光纤集成高平均功率方形纳秒脉冲激光器。种子源是一个被动锁模掺镱光纤激光器，其基本腔重复频率为1.86MHz。方形输出脉冲的脉宽可在271ps至纳秒级范围内调谐。经过三级前置放大器后，平均输出功率达到9.21W。最后，研制了一个主放大器，将平均输出功率提高到240W，相应的脉冲能量和峰值功率分别约为129.3μJ和36kW。主放大器的效率约为61.3%，由M²因子表示的光束质量在X和Y方向上均低于1.3和1.2。