142 W高峰值功率窄线宽线偏振脉冲光纤激光器

张昆; 周寿桓; 李尧; 张利明; 余洋; 张浩彬; 朱辰; 张大勇; 赵鸿

doi:10.3788/IRLA202049.0405003

142 W高峰值功率窄线宽线偏振脉冲光纤激光器

142 W high peak power narrow-linewidth linearly polarized pulsed fiber laser

摘要

摘要: 报道了一种基于主振荡功率放大（MOPA）结构工作的全光纤窄线宽线偏振纳秒脉冲光纤激光器。脉冲种子源是由一个分布反馈直腔型（DFB）单频光纤激光器被光电调制器进行强度调制后产生的。为了抑制受激布里渊散射（SBS）效应，脉宽被调节为3 ns，并且种子源线宽被相位调制器展宽为2.9 GHz。经两级保偏掺Yb³⁺光纤放大器放大后，获得了平均功率142 W，重复频率1 MHz，脉冲宽度2.88 ns，峰值功率49.3 kW的脉冲激光输出。在最大输出功率时，激光光束质量因子M²约为1.15，偏振消光比（PER）大于15.4 dB。

Abstract: An all fiber linearly polarized narrow-linewidth nanosecond pulsed fiber laser based on master oscillator power amplifier (MOPA) structure was reported. The pulsed seed was generated by modulating a single-frequency distributed feedback (DFB) fiber laser using an electro-optic intensity modulator. In order to suppress stimulated Brillouin scattering (SBS), the pulse width was set to be 3 ns and the linewidth of seed was broadened to be 2.9 GHz by a phase modulator. After amplifying by two stages polarization maintaining Yb³⁺ doped fiber amplifier chain, the output pulse laser was obtained with an average power of 142 W, a repetition rate of 1 MHz, a pulse duration of 2.88 ns, corresponding to peak power of 49.3 kW. At maximum output power, the laser beam quality M² was ～ 1.15 and the polarization extinction ratio(PER) was >15.4 dB.

HTML全文

参考文献(13)

施引文献

资源附件(0)