20 February 2015 Investigation of mechanically Q-switched lasers
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Using a resonant scanner mirror Q-switch to provide a time varying change in cavity alignment, 1535nm lasers based on Er/Yb-doped glass and 1064nm lasers based on Nd:YAG were evaluated. Using a side pumping architecture, the Er/Yb glass laser used a compact mechanical Q-switch with a mirror rotation rate of 330 Rad/s, enabling generation of <3 mJ pulses with a pulse width of 16ns. The laser output was a diffraction limited TEM00 mode. A mechanical Q-switch based on a MEMS tilting mirror was also used; its performance in a laser cavity was found to be similar to the resonant mirror. The technique of mechanical Q-switching was also extended to a side pumped Nd:YAG laser (mirror sweep rate of 1300 Rad/s), enabling generation of Q-switched pulses of <30mJ and 25ns duration. The far-field divergence showed this laser to be highly multi-moded within the pump plane, with a measured beam-product-parameter greater than 30 mm-mRad.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Brian Cole, Brian Cole, Lew Goldberg, Lew Goldberg, Nathaniel Hough, Nathaniel Hough, John E. Nettleton, John E. Nettleton, "Investigation of mechanically Q-switched lasers", Proc. SPIE 9342, Solid State Lasers XXIV: Technology and Devices, 93421P (20 February 2015); doi: 10.1117/12.2081256; https://doi.org/10.1117/12.2081256


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