Solid state Raman laser for frequency conversion and beam cleanup of high-average-power lasers

AnnMarie L. Oien; J. P. Tucker; G. T. Bennett; Iain T. McKinnie; D. D. Smith

doi:10.1117/12.407339

16 August 2000 Solid state Raman laser for frequency conversion and beam cleanup of high-average-power lasers

AnnMarie L. Oien, J. P. Tucker, G. T. Bennett, Iain T. McKinnie, D. D. Smith

Proceedings Volume 4065, High-Power Laser Ablation III; (2000) https://doi.org/10.1117/12.407339
Event: High-Power Laser Ablation, 2000, Santa Fe, NM, United States

Abstract

Current established solid state Raman laser (SSRL) materials tend to be oxides or tungstates, which have low thermal conductivity and therefore inherently limited power scaling potential. We have tested the Raman material bulk undoped gallium phosphide (GaP), which has excellent thermal and mechanical properties, and assessed its ability to power scale. Pumping GaP with 1.06 and 1.3 micron Q- Switched Nd:YAG lasers has resulted in outputs of up to 14 mJ, the highest pulse energy GaP Raman laser known to date. Conclusions from laboratory tests and finite element modeling indicate that this Raman laser material can scale to kW average output power levels. We are currently investigating Raman lasers that will improve the pump laser spatial beam quality during Raman conversion. This could be developed into an add-on 'kit' that would improve beam quality in Nd:YAG industrial lasers with power output levels of over 100 W. We will present our latest GaP Raman laser laboratory results and discuss power scaling performance estimates.

Citation Download Citation

AnnMarie L. Oien, J. P. Tucker, G. T. Bennett, Iain T. McKinnie, and D. D. Smith "Solid state Raman laser for frequency conversion and beam cleanup of high-average-power lasers", Proc. SPIE 4065, High-Power Laser Ablation III, (16 August 2000); https://doi.org/10.1117/12.407339

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