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Proceedings Paper

Pump laser effect on temporal jittering of pulses from passively Q-switched Nd:YVO[sub]4[/sub] laser
Author(s): Kangin Lee; Youngjung Kim; Jin Hyuk Kwon; Jonghoon Yi
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Paper 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.

Paper Details

Date Published: 17 February 2010
PDF: 8 pages
Proc. SPIE 7578, Solid State Lasers XIX: Technology and Devices, 75782A (17 February 2010); doi: 10.1117/12.840069
Show Author Affiliations
Kangin Lee, Yeungnam Univ. (Korea, Republic of)
Youngjung Kim, Yeungnam Univ. (Korea, Republic of)
Jin Hyuk Kwon, Yeungnam Univ. (Korea, Republic of)
Jonghoon Yi, Yeungnam Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 7578:
Solid State Lasers XIX: Technology and Devices
W. Andrew Clarkson; Norman Hodgson; Ramesh K. Shori, Editor(s)

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