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27 April 2016 Passively Q-switched single-frequency 2μm laser used graphene as saturable absorber
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A graphene passively Q-switched single frequency Ho:YAG laser was demonstrated. Ho:YAG crystal was resonantly pumped by a 1908 nm diode laser. Twisted-mode single frequency technique was applied to realize single frequency oscillation. The maximum single frequency laser output was 358 mW. Single frequency pulse laser output was achieved by inserting a graphene into the single frequency Ho:YAG laser. The maximum average power of 149 mW was obtained with the pulse repetition rate of 40.45 kHz under 8.32 W of incident pump power.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Lei Wang "Passively Q-switched single-frequency 2μm laser used graphene as saturable absorber", Proc. SPIE 9893, Laser Sources and Applications III, 98930U (27 April 2016);


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