In this talk, we review our recent progress on short-pulse, high-peak-power Photonic-Crystal Surface-Emitting Lasers (PCSELs). First, we propose PCSELs that have 2D arranged gain and loss, which enable high-peak-power, short-pulse operation in the fundamental mode while suppressing lasing in higher-order modes. Based on this design, we demonstrate short-pulse generation with a peak power of several tens of watts and a short pulse width of <40 ps. To further increase the peak power, we also propose the concept of self-Q-switched PCSELs, where short-pulse generation with a 100-W-class peak power is induced even without saturable absorbers.
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