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21 February 2020 High efficiency gallium nitride laser diode pumped CW ruby laser
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Abstract
The design and performance of a laser diode pumped ruby laser is reported. The laser consists of a 5 mm long 0.05% doped ruby crystal placed within a hemispherical laser resonator. A single mode gallium nitride laser diode, operating at 405 nm provided up to 320 mW of pump power. Beam shaping optics were used to circularize the pump beam and a 150 mm focal length lens produced a ~20 μm waist in the crystal. The laser produced up to 44 mW of output power with a slope efficiency of 17%.
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William F. Krupke and Jason Zweiback "High efficiency gallium nitride laser diode pumped CW ruby laser", Proc. SPIE 11259, Solid State Lasers XXIX: Technology and Devices, 112591P (21 February 2020); https://doi.org/10.1117/12.2545176
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