Su Rongtao, Zhou Pu, Ma Pengfei, Lü Haibin, Xu Xiaojun
Appl Opt. 2013 Oct 20;52(30):7331-5. doi: 10.1364/AO.52.007331.
We demonstrated a high-peak-power, single-frequency, single-mode, linearly polarized, nanosecond all-fiber laser in master oscillator power amplifier configuration. The pulsed seed was generated by modulating a single-frequency continuous wave laser at 1064 nm. The short pulse width (∼3.2 ns) of the pulsed seed prevented the onset of stimulated Brillouin scattering in the 10 μm-core single-transverse-mode polarization-maintaining ytterbium-doped fiber of the main amplifier. In order to compensate self-phase modulation-induced spectral broadening, a phase modulator was employed to control the phase of the pulsed seed, and the linewidth of the output pulses were reduced from ∼1.22 GHz to ∼185 MHz at the peak power of 1.47 kW.
我们展示了一种采用主振荡功率放大器结构的高峰值功率、单频、单模、线偏振纳秒全光纤激光器。脉冲种子源是通过调制1064 nm的单频连续波激光器产生的。脉冲种子源的短脉冲宽度（约3.2 ns）可防止在主放大器的10μm纤芯单横模保偏掺镱光纤中产生受激布里渊散射。为了补偿自相位调制引起的光谱展宽，采用相位调制器控制脉冲种子源的相位，在1.47 kW的峰值功率下，输出脉冲的线宽从约1.22 GHz减小到约185 MHz。
