Pump laser effect on temporal jittering of pulses from passively Q-switched Nd:YVO[sub]4[/sub] laser

Kangin Lee; Youngjung Kim; Jin Hyuk Kwon; Jonghoon Yi

doi:10.1117/12.840069

17 February 2010 Pump laser effect on temporal jittering of pulses from passively Q-switched Nd:YVO₄ laser

Kangin Lee, Youngjung Kim, Jin Hyuk Kwon, Jonghoon Yi

Proceedings Volume 7578, Solid State Lasers XIX: Technology and Devices; 75782A (2010) https://doi.org/10.1117/12.840069
Event: SPIE LASE, 2010, San Francisco, California, United States

Abstract

Temporal jittering has been problem in industrial application of passively Q-switched laser. To address this, we tried two methods. The first is preventing pump laser absorption in the Cr:YAG, which is used for saturable absorber. The saturation of the Cr:YAG should be affected by intracavity photons generated by stimulated emission in Nd:YVO₄ crystal for reliable Q-switching operation. To prevent pump absorption, we applied 808 nm mirror coating on the Cr:YAG crystal. This coating also enhanced efficiency of pump laser utilization because the reflected beam was reabsorbed in the Nd:YVO₄ crystal. As the second method, we applied pulsed current to the laser diode. The Q-switched laser is generated only after the pulse diode laser beam was absorbed in the Nd:YVO₄ crystal. The pulsewidth of current pulse was carefully adjusted for Q-switched output pulse per each pump pulse. Air circulation is reduced by contacting crystals together and applying output coupler coating on the Cr:YAG crystal surface.

Citation Download Citation

Kangin Lee, Youngjung Kim, Jin Hyuk Kwon, and Jonghoon Yi "Pump laser effect on temporal jittering of pulses from passively Q-switched Nd:YVO₄ laser", Proc. SPIE 7578, Solid State Lasers XIX: Technology and Devices, 75782A (17 February 2010); https://doi.org/10.1117/12.840069

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