Saturation and power scaling in cryogenic optical refrigeration of Yb:YLF

Jackson L. Kock; Duncan McGraw; Alexander Neumann; Denis V. Seletskiy; Alexander R. Albrecht; Mansoor Sheik-Bahae

doi:10.1117/12.3005373

13 March 2024 Saturation and power scaling in cryogenic optical refrigeration of Yb:YLF

Jackson L. Kock, Duncan McGraw, Alexander Neumann, Denis V. Seletskiy, Alexander R. Albrecht, Mansoor Sheik-Bahae

Proceedings Volume PC12902, Photonic Heat Engines: Science and Applications VI; PC1290205 (2024) https://doi.org/10.1117/12.3005373
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

Recent advances in cryogenic optical refrigeration have demonstrated cooling of a payload to below 125 K, enabled by several improvements. The parasitic load from pump and fluorescence scattering on the payload are minimized using a textured-MgF2 thermal link. Amplified Spontaneous Emission and lasing are suppressed by spectrally selective coatings on the multi-pass pump circulator. Power scaling of the cooling lift at cryogenic temperatures is yet to be observed, prompting us to investigate the negative contribution of pump saturation on a material’s cooling efficiency and, thus, Minimal Achievable Temperature. A systematic study of the power-dependent performance of the cryocooler is reported.

Conference Presentation

Citation Download Citation

Jackson L. Kock, Duncan McGraw, Alexander Neumann, Denis V. Seletskiy, Alexander R. Albrecht, and Mansoor Sheik-Bahae "Saturation and power scaling in cryogenic optical refrigeration of Yb:YLF", Proc. SPIE PC12902, Photonic Heat Engines: Science and Applications VI, PC1290205 (13 March 2024); https://doi.org/10.1117/12.3005373

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