基于简单MOPA结构实现3.08kW全光纤窄线宽线偏振激光输出

Output of 3.08kW narrow linewidth linearly polarized all-fiber laser based on a simple MOPA structure

基于简单的主振荡功率放大结构,演示了一种高功率窄线宽线性偏振全光纤激光器,其最大输出功率为3.08 kW,3 dB线宽为0.2 nm。在整个功率缩放过程中,偏振消光比约为94%,光束质量M 2约为1.4。这是国内外首次实现3 kW全保偏光纤激光输出,与基于相位调制的窄线宽激光器相比,该激光器可实现近似的线宽,同时具有受激布里渊散射阈值高、系统结构简单、成本低等特点。

We demonstrated a narrow linewidth linearly polarized all-fiber laser operating at maximum output power of 3.08 kW with a 3 dB linewidth of 0.2 nm based on a simple master oscillator power amplifier(MOPA)structure.The polarization extinction ratio(PER)is about 94%and the M 2 is about 1.4 along the whole power scaling process.This is the first demonstration of a 3 kW linearly polarized all-fiber laser output.Compared with the narrow linewidth fiber amplifier based on phase modulation,this system can achieve a nearly same linewidth.Meanwhile,it has the characteristics of high stimulated Brillouin scattering(SBS)threshold,simple structure,and low cost,etc.