Graphene Q-switched Yb:KYW planar waveguide laser

Jun Wan Kim, Sun Young Choi, S. Aravazhi, Markus Pollnau, Uwe Griebner, Valentin Petrov, Sukang Bae, Kwang Jun Ahn, Dong-Il Yeom, Fabian Rotermund

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    A diode-pumped Yb:KYW planar waveguide laser, single-mode Q-switched by evanescent-field interaction with graphene, is demonstrated for the first time. Few-layer graphene grown by chemical vapor deposition is transferred onto the top of a guiding layer, which initiates stable Q-switched operation in a 2.4-cm-long waveguide laser operating near 1027 nm. Average output powers up to 34 mW and pulse durations as short as 349 ns are achieved. The measured output beam profile, clearly exhibiting a single mode, agrees well with the theoretically calculated mode intensity distribution inside the waveguide. As the pump power is increased, the repetition rate and pulse energy increase from 191 to 607 kHz and from 7.4 to 58.6 nJ, respectively, whereas the pulse duration decreases from 2.09 μs to 349 ns.
    Original languageEnglish
    Pages (from-to)017110
    Number of pages6
    JournalAIP advances
    Issue number1
    Publication statusPublished - Jan 2015


    • IOMS-APD: Active Photonic Devices
    • IR-93659
    • METIS-312478
    • EWI-25576


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