28 W 高功率超连续谱光纤激光光源

报道了一个全光纤结构的高功率超连续谱激光光源。利用自行搭建的环形腔掺镱脉冲光纤激光器作为种子源，采用三级MOPA功率放大，得到了平均功率为62W，中心波长为1 065 nm，3 dB谱宽15 nm，重复频率为118 MHz的皮秒锁模脉冲输出，将其耦合进零色散波长为1 040 nm的光子晶体(PCF)，最终得到平均功率为28 W，谱宽覆盖范围为600~1 700 nm的超连续谱激光输出，超连续谱的光-光转换效率为45%。实验解决了高功率下大芯径掺杂光纤与PCF的耦合效率低的问题。

High power 28 W supercontinuum fiber laser source

An all -fiber high power supercontinuum laser source was experimentally reported. An ytterbium-doped ring fiber oscillator was established as the seed source. By utilizing a three-stage master oscillator power amplifier (MOPA), the signal light average power was amplified to 62 W with a central wavelength of 1 065 nm, the 3 dB spectral bandwidth was 15 nm, and the repetition rate was 118 MHz. By coupling the amplified pulsed laser into a piece of photonic crystal fiber(PCF) with a 1 040 nm zerodispersion wavelength, supercontinuum with 28W output average power was obtained, the spectrum range was covering from 600 nm to 1 700 nm, and the optical conversion efficiency is 45%. In this experiment, the coupling problem between large core doped fiber and photonic crystal fiber at high output power was also solved.