Abstract
The longest wavelength (~1.4 µm) emitted by a diamond Raman laser pumped by a semiconductor disk laser (SDL) is reported. The output power of the intracavity-pumped Raman laser reached a maximum of 2.3 W with an optical conversion efficiency of 3.4% with respect to the absorbed diode pump power. Narrow Stokes emission (FWHM <0.1 nm) was attained using etalons to limit the fundamental spectrum to a single etalon peak. Tuning of the Raman laser over >40 nm was achieved via rotation of an intracavity birefringent filter that tuned the SDL oscillation wavelength.
Highlights
Raman lasers use stimulated Raman scattering to down-convert the emission frequency of the pump laser, with an energy difference fixed by the Raman medium, extending the spectral coverage of solid-state lasers
The longest wavelength (~1.4 μm) emitted by a diamond Raman laser pumped by a semiconductor disk laser (SDL) is reported
Tuning of the Raman laser over >40 nm was achieved via rotation of an intracavity birefringent filter that tuned the SDL oscillation wavelength
Summary
Raman lasers use stimulated Raman scattering to down-convert the emission frequency of the pump laser, with an energy difference fixed by the Raman medium, extending the spectral coverage of solid-state lasers.
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