Energy scale-up and mode-quality enhancement of the LED-pumped Nd:YAG Q-switched laser achieving a millijoule green pulse

Chun Yu Cho, Chi Chih Pu, Yung Fu Chen, Kuan-Wei Su*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    Abstract

    An efficient LED pumping module is explored for the demonstration of energy scaling of passively Q-switched output to millijoule high-pulse-energy level. For the free-running operation at fundamental wavelength, the highest optical conversion efficiency of 23.7% is reached. By using a Cr4+:YAG crystal as the saturable absorber, the passively Q-switched output energy is up to 14.5 mJ in a compact setup. The laser resonator is further optimized to shorten the output pulse width and to obtain better mode quality. The pulse width of the Q-switched emission is as short as 25 ns, and the peak power is up to 0.7 MW. With such a highly efficient configuration, the extracavity second-harmonic generation at 532 nm can be achieved with 4.5 mJ pulse energy. (C) 2019 Optical Society of America

    Original languageEnglish
    Pages (from-to)3202-3205
    Number of pages4
    JournalOptics Letters
    Volume44
    Issue number13
    DOIs
    StatePublished - 1 Jul 2019

    Keywords

    • LUMINESCENT CONCENTRATORS

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