Journal
OPTICS EXPRESS
Volume 23, Issue 16, Pages 21490-21496Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.021490
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Funding
- National Nature Science Foundation of China [61475076, 61405139, 11174159]
- Nature of Science Foundation of Tianjin [14JCYBJC16400]
- MOE
- Chinese National Key Basic Research Special Fund [2011CB922003]
- National Science Fund for Talent Training in Basic Sciences [J1103208]
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We demonstrate an all-optical Q-switcher based on graphene saturable absorber (GSA). Due to the cross absorption modulation (XAM) effect in graphene, we can change the transmittance of signal light periodically by introducing a train of laser pulses into graphene. This allows controlling the Q-factor of the cavity. This Q-switcher has many advantages such as all-fiber structure, all-optical modulation, broadband applications. With this Q-switcher, we have successfully fabricated an actively Q-switched ytterbium-doped fiber laser. The pulse repetition rate can be tuned from 30.32 kHz to 101.29 kHz. What's more, synchronization of the Q-switched laser pulses and modulation laser pulses can be realized, which has many potential applications such as nonlinear frequency conversion, multi-color pump probe spectroscopy and Raman scattering spectroscopy. (C) 2015 Optical Society of America
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