期刊
OPTICS EXPRESS
卷 21, 期 24, 页码 29516-29522出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.21.029516
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- National Natural Science Foundation of China (NSFC) [61177044, 61107038]
- Natural Science Foundation of Fujian Province of China [2011J01370]
Passive Q-switching of an ytterbium-doped fiber (YDF) laser with few-layer topological insulator (TI) is, to the best of our knowledge, experimentally demonstrated for the first time. The few-layer TI: Bi2Se3 (2-4 layer thickness) is firstly fabricated by the liquid-phase exfoliation method, and has a low saturable optical intensity of 53 MW/cm(2) measured by the Z-scan technique. The optical deposition technique is used to induce the few-layer TI in the solution onto a fiber ferrule for successfully constructing the fiber-integrated TI-based saturable absorber (SA). By inserting this SA into the YDF laser cavity, stable Q-switching operation at 1.06 mu m is achieved. The Q-switched pulses have the shortest pulse duration of 1.95 mu s, the maximum pulse energy of 17.9 nJ and a tunable pulse-repetition-rate from 8.3 to 29.1 kHz. Our results indicate that the TI as a SA is also available at 1 mu m waveband, revealing its potential as another broadband SA (like graphene). (C) 2013 Optical Society of America
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