High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering

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Abstract
A continuous-wave (CW) single-longitudinal-mode (SLM) Raman laser at 1240 nm with power up to 20.6 W was demonstrated in a free-running diamond Raman oscillator without any axial-mode selection elements. The SLM operation was achieved due to the spatial-hole-burning free nature of Raman gain and maintained at highest available pump power by suppressing the parasitic stimulated Brillouin scattering (SBS). A folded-cavity design was employed for reducing the perturbing effect of resonances at the pump frequency. At a pump power of 69 W, the maximum Stokes
Funding Information
  • National Key Research and Development Program of China (2020YFC2200300)
  • National Natural Science Foundation of China (62005073)

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