期刊
NANOSCALE
卷 8, 期 14, 页码 7704-7710出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr08457a
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资金
- National Natural Science Foundation of China [51132004, 51102096, 11404114]
- China Postdoctoral Science Foundation [2015T80903]
- Guangdong Natural Science Foundation [S2011030001349, 1045106410104887]
Strong saturable absorption was observed in MoS2 nanoflowers, which were synthesized by a facile solvothermal method. A MoS2 nanoflower-based saturable absorber with a high modulation depth of 51.8% and a large saturable intensity of 275.5 GW cm(-2) was introduced to the application of passively Q-switched fiber laser generation. Stable passively Q-switched fiber laser pulses at 1.56 mu m with a low threshold power of 16.10 mW, high signal-to-noise ratio of 52.5 dB and short pulse duration of 1.9 mu s were obtained. More importantly, a high output power of 3.10 mW related to a large pulse energy of about 51.84 nJ can be attained at a very low pump power. The efficiency of the laser reaches 4.71%, which is larger than that of the prepared layered MoS2 and recently reported MoS2-based passively Q-switching operations. Such results imply that the MoS2 nanoflowers are an excellent candidate for a saturable absorber in passively Q-switched fiber lasers at a low pump intensity.
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