期刊
LASER PHYSICS LETTERS
卷 19, 期 3, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1612-202X/ac4be7
关键词
supercontinuum generation; graded-index multimode fiber; stimulated Raman scatter
资金
- National Natural Science Foundation of China [61690222]
This study presents an all fiber spectrally flat supercontinuum source and reveals nonlinear phenomena in the generation of supercontinuum by investigating the evolution of output power.
We provide an all fiber spectrally flat supercontinuum (SC) source generated by pumping a 20 m graded-index multimode fiber (MMF). The fiber pigtails of the all-fiber pump pulse laser and the MMF fused with a special method. After measuring the spectrum and the power, the output power extending from the visible to the mid-infrared is 2 W. To the best of our knowledge, this is the first watt-class and spectrally flat all fiber structured SC source based on graded-index MMF. Finally, we studied the evolution of the SC with increasing output power, which permitted us to more clearly recognize the nonlinear phenomena in the generation of the SC.
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