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We have generated the backward terahertz pulses with record-high average powers of 2.3-11 muW and narrowest bandwidth of 6 GHz from multi-grating periodically-poled lithium niobate by optical rectification at room temperature.
We have efficiently generated coherent mid-infrared pulses at 3.42 mum by mixing a CO2 laser beam with its second-harmonic output beam in a CdSe crystal with the output peak power as high as 39.2 W.
We efficiently generated ultrafast coherent ultraviolet radiation based on second harmonic generation in periodically-poled KTiOPO4 with the shortest period of 2.55 mum. The highest output power was measured to be 20.1 mW at 377.1 nm.
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