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采用自行搭建的被动锁模皮秒脉冲掺镱光纤激光器作为抽运源,将其输出尾纤与国产光子晶体光纤(PCF)进行低损耗熔接,构成全光纤结构的高功率超连续谱(SC)光源。全光纤结构提高了超连续谱产生系统的稳定性和转换效率。实验观察了皮秒脉冲在正常色散区抽运光子晶体光纤产生超连续谱过程,并对超连续谱的产生机理进行了理论解释。该光源输出平均功率为4.6W的超连续谱,超连续光谱展宽超过1000nm,光光转换效率为54%。
A passive mode-locked picosecond-pulse ytterbium-doped fiber laser with a self-built passive optical fiber was used as the pump source. The output pigtail was fused with domestic PCF to form a high power supercontinuum (SC) light source. The all-fiber structure improves the stability and conversion efficiency of the supercontinuum generation system. Experimental observation of the picosecond pulse in the normal dispersion region of the photonic crystal fiber supercontinuum generation process, and supercontinuum generation mechanism of a theoretical explanation. The light source outputs a supercontinuum with an average power of 4.6W, the supercontinuum spectrum broadens over 1000nm and the light-to-light conversion efficiency is 54%.