基于锁模脉冲泵浦的全光纤化超连续谱光源

All-fiber supercontinuum laser source pumped by mode-locked pulse

采用基于半导体可饱和吸收镜（SESAM）的被动锁模方案,通过三级主振荡功率放大（MOPA）结构,构建了平均输出功率39.2 W的全光纤皮秒脉冲光纤激光器。输出激光脉冲宽度10.7 ps,重复频率68 MHz。利用该皮秒光纤激光器泵浦一段4.5 m长的国产光子晶体光纤（PCF）,实现了平均功率20.1 W的全光纤化结构超连续谱（SC）光纤激光输出。光谱宽度超出所用光谱仪600-1700 nm 的观测范围,在观测范围内具有10 dB 的光谱平坦度。

All fiber picosecond ytterbium doped fiber laser with average output power of 39.2 W is constructed with a passively mode-locked seed laser based on semiconductor saturable absorber mirror and triple-stage master oscillator power amplifier （MOPA） configuration. When pumped power is 65.1 W,pulse width of output laser is 10.7 ps and repetition frequency is 68 MHz. This picoseconds fiber laser is used to pump a 4.5 m long photonic crystal fiber,and all-fiber supercontinuum laser source with average power 20.1 W is realized. The supercontinuum covers the whole spectral range from 600 to 1700 nm of the optical spectrum analyzer. The spectral flatness is 10 dB in the detected spectral range.