Repetition rate control in continuous-wave-pumped, passively Q-switched solid-state lasers

Alphan Sennaroglu; Huseyin Cankaya; Adnan Kurt

doi:10.1117/1.2709857

1 February 2007 Repetition rate control in continuous-wave-pumped, passively Q-switched solid-state lasers

Alphan Sennaroglu, Huseyin Cankaya, Adnan Kurt

Author Affiliations +

Optical Engineering, Vol. 46, Issue 2, 024201 (February 2007). https://doi.org/10.1117/1.2709857

Abstract

We describe a technique for the adjustment and control of repetition rates in continuous-wave-pumped, passively Q-switched solid-state lasers. The method uses a movable intracavity lens to modify the mode matching and hence the gain of the laser beam per pass. The technique was applied to a diode-pumped Nd3+:YVO4 laser passively Q-switched with a Cr4+:YAG saturable absorber at 1064 nm. At a fixed pump power of 5.4 W, we were able to continuously adjust the repetition rate between 13.8 and 25 kHz by translating an intracavity converging lens. We also demonstrate that by adjusting the lens position, the repetition rate can be kept at a desired value as the pump power varies. In particular, as the pump power was increased from 3.95 to 5.9 W, the lens position was varied by 0.91 cm to keep the repetition rate constant at 13.8 kHz. Rate-equation formalism was used to investigate the variation of the repetition rate as a function of lens position, and very good agreement was obtained between experiment and theory.

©(2007) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Alphan Sennaroglu, Huseyin Cankaya, and Adnan Kurt "Repetition rate control in continuous-wave-pumped, passively Q-switched solid-state lasers," Optical Engineering 46(2), 024201 (1 February 2007). https://doi.org/10.1117/1.2709857

Published: 1 February 2007

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KEYWORDS

Q switched lasers

Solid state lasers

YAG lasers

Crystals

Chromium

Neodymium

Nd:YAG lasers

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