Continuous-wave diamond Raman laser at 1.2μm with 85W output power in a single pump pass configuration

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Summers, Peter A. and Barber, Matthew J. and Watkins, Benedict and Terry, Daniel J. and Kemp, Alan J. and Savitski, Vasili G.; Mcquage, Matthew and Clark, Amy and Wilson, Christopher R., eds. (2026) Continuous-wave diamond Raman laser at 1.2μm with 85W output power in a single pump pass configuration. In: Proceedings of SPIE. Proceedings of SPIE, 14022 . SPIE, National Harbor, Maryland. (https://doi.org/10.1117/12.3094210)

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Abstract

Diamond possesses a unique combination of both the highest Raman gain and thermal conductivity among any solid-state bulk material. This makes it the most suitable crystal for high-power laser sources at alternative wavelengths. Technical limitations for the power scaling of diamond Raman lasers (DRL) are linked to the size of commercially available synthetic diamond crystals, the quality of anti-reflection coatings on the diamond surfaces, pump emission polarisation and linewidth, thermal lensing, and optical isolation. A diamond Raman laser is demonstrated operating under single pump pass, eliminating the need of any optical isolator. The maximum output power was 85 W at 482 W of incident pump power with the slope efficiency 21%. Thermal analysis of the DRL indicated that resonator misalignment due to heating of the input mirror was the main limitation to further power scaling and stability improvements.

ORCID iDs

Summers, Peter A., Barber, Matthew J., Watkins, Benedict, Terry, Daniel J., Kemp, Alan J. ORCID logoORCID: https://orcid.org/0000-0002-1076-3138 and Savitski, Vasili G.; Mcquage, Matthew, Clark, Amy and Wilson, Christopher R.
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