A CW diode-pumped alkali laser (DPAL) based on the D1 rubidium resonance transition has been investigated. The
pump sources for these experiments are two 780 nm fiber-coupled diode modules, incorporating volume holographic
gratings for wavelength control. Total pump power is up to 64 W. Rb laser output at the 794.8 nm fundamental
wavelength is up to 7.8 W. Intracavity second harmonic generation in BIBO generates up to 250 mW at 397.4 nm.
The CW diode-pumped alkali laser (DPAL) based on the rubidium resonance transition at 794.8 nm has been
investigated. The pump sources for these experiments are commercially available 780 nm fiber-coupled diode modules,
incorporating volume holographic gratings for wavelength control. Operating characteristics, pump architecture, power
scaling and lifetime limitations have been studied. To date, lasers pumped by single 20 W diode bars have produced
over 1 W output at 794.8 nm and 100 mW at the 397.4 nm harmonic. Lasers pumped by two 40 W diodes generate
almost 8 W at 794.8 nm.
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