1.5kW近衍射极限全光纤窄带超荧光光源

1.5 kW Near-Diffraction-Limited Narrowband All-Fiber Superfluorescent Source

搭建了一个全光纤主振荡功率放大(MOPA)近衍射极限输出的超荧光源,线宽为亚纳米量级,最大输出功率为1509 W,输出斜率效率达到85.2%,光束质量因子稳定在M2=1.4。后向回光功率与输入功率呈线性关系,系统很好地抑制了受激布里渊散射(SBS),并且对环境具有很好的抗干扰能力。在整个输出功率范围内,没有观察到自脉冲和弛豫振荡现象。

A sub-nanometer linewidth, near-diffraction-limited superfluorescent source with a record power of 1509 W based on all-fiber master oscillator power amplifier （MOPA） configuration is established. The slope efficiency of the main amplifier is up to 85.2 % and the beam quality at maximum power stays stable around M2= 1.4. The back reflection power maintains a linear behavior which confirms the considerable stimulated Brillouin scattering （SBS） suppression capability of our system. The performance of this high power source is robust with respect to the environment perturbations. No self-pulsing and relaxation oscillation is observed in the whole power range.