期刊
OPTICS EXPRESS
卷 22, 期 25, 页码 31113-31122出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.22.031113
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资金
- Royal Academy of Engineering (RAEng), through a RAEng Fellowship
- RCTH from EPSRC [EP/G037221/1]
- CSC Cambridge International Scholarship
- RAEng (Graphlex)
- Engineering and Physical Sciences Research Council [1108063, 1227061] Funding Source: researchfish
We fabricate a few-layer molybdenum disulfide (MoS2) polymer composite saturable absorber by liquid-phase exfoliation, and use this to passively Q-switch an ytterbium-doped fiber laser, tunable from 1030 to 1070 nm. Self-starting Q-switching generates 2.88 mu s pulses at 74 kHz repetition rate, with over 100 nJ pulse energy. We propose a mechanism, based on edge states within the bandgap, responsible for the wideband nonlinear optical absorption exhibited by our few-layer MoS2 sample, despite operating at photon energies lower than the material bandgap. (C) 2014 Optical Society of America
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