12 January 2005 Diode-pumped CW Tm:GdVO4 laser using floating zone-grown crystals
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Abstract
Efficient CW laser oscillation was performed using floating zone-grown Tm:GdVO4 crystals. The measured absorption spectra of the grown crystals exhibited high absorption coefficient of 13.2 cm-1 at 799 nm for π polarization, and the absorption coefficient remained more than 4.5 cm-1 at 808 nm for both π- and σ-polarizations. Using a 808 nm single-stripe laser diode as a pump source, a slope efficiency of 38% and a threshold of 420 mW were achieved with respect to absorbed pump power at room temperature. The highest output power of 235 mW was achieved. The laser could be tuned over 20 nm with rotation of an intracavity etalon. It was demonstrated that Tm:GdVO4 is an excellent material for use in a 2 μm laser for a compact LD-pumped system.
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Yoshiharu Urata, Hiroshi Machida, Mikio Higuchi, Kohei Kodaira, Satoshi Wada, "Diode-pumped CW Tm:GdVO4 laser using floating zone-grown crystals", Proc. SPIE 5653, Lidar Remote Sensing for Industry and Environmental Monitoring V, (12 January 2005); doi: 10.1117/12.578230; https://doi.org/10.1117/12.578230
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