Intracavity second-harmonic generation at 320 nm of an actively Q-switched Pr: LiYF sub(4) laser

We demonstrate pulse laser operation of a Pr: LiYF sub(4) laser pumped by InGaN laser diodes (444 nm) using an acousto-optic modulator. We obtained a maximum laser peak power of 167 W (4 mu J/pulse) with a pulse width of 24 ns at an 11 kHz repetition rate for a 63 nm wavelength. Employing an 8 mm lo...

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Bibliographic Details
Published in:Applied optics (2004) 2012-03, Vol.51 (9), p.1382-1386
Main Authors: Kojou, J, Watanabe, Y, Kojima, Y, Nemoto, H, Kannari, F
Format: Article
Language:English
Subjects:
Conversion
Crystals
Indium gallium nitrides
Laser cavities
Lasers
Modulators
Pulse width
Wavelengths
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Summary:We demonstrate pulse laser operation of a Pr: LiYF sub(4) laser pumped by InGaN laser diodes (444 nm) using an acousto-optic modulator. We obtained a maximum laser peak power of 167 W (4 mu J/pulse) with a pulse width of 24 ns at an 11 kHz repetition rate for a 63 nm wavelength. Employing an 8 mm long lithium triborate nonlinear crystal in the laser cavity, we obtained a maximum peak power of 55 W (2.7 mu J/pulse) at 320 nm, which corresponds to a conversion efficiency of 69% with respect to the fundamental laser energy. The UV laser pulse width was 36 ns.
ISSN:1559-128X