Abstract
We report Q-switched operation of a dual-cavity Nd:YAG laser with a fundamental Gaussian TEM00 mode, a first-order Laguerre–Gaussian mode, or a multimode, which can be selected simply by adjusting the apertures in the primary and secondary cavities. By exploiting an acousto-optic modulator, the laser produced Q-switched pulses of a pulse energy of 146 μJ with a pulse duration of 101 ns at a repetition rate of 1 kHz in the TEM00 mode, 140 μJ with a pulse duration of 102 ns in the LG01 mode, and 160 μJ with a pulse duration of 98 ns in the multimode. A simple analytical expression for the overlap efficiency of the LG01 mode in the dual-cavity resonator is also derived, showing that the calculated result is in very good agreement with the experimental value. The prospects of further improvement in the dual-cavity laser with tunable laser beam profiles are discussed.
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Funding
This research was supported by the Technology Innovation Program (or Industrial Strategic Technology Development Program) (20017395, Development of femtosecond laser with 300 W 500 fs and wafer dicing equipment for 50 um wafer) funded By the Ministry of Trade, Industry & Energy(MOTIE, Korea).
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Park, E.K., Oh, Y.J., Park, I.C. et al. Q-switched operation of dual-cavity Nd:YAG lasers. J. Korean Phys. Soc. 83, 848–853 (2023). https://doi.org/10.1007/s40042-023-00949-w
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DOI: https://doi.org/10.1007/s40042-023-00949-w