Power scaling of Yb-based optical cryo-coolers

Jackson Kock; Azzurra Volpi; Alexander R. Albrecht; Duncan McGraw; Richard I. Epstein; Mansoor Sheik-Bahae

doi:10.1117/12.2611600

9 March 2022 Power scaling of Yb-based optical cryo-coolers

Jackson Kock, Azzurra Volpi, Alexander R. Albrecht, Duncan McGraw, Richard I. Epstein, Mansoor Sheik-Bahae

Proceedings Volume PC12018, Photonic Heat Engines: Science and Applications IV; PC1201803 (2022) https://doi.org/10.1117/12.2611600
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Optical refrigeration of Yb:YLF is used to cool an arbitrary payload. An astigmatic Herriott cell enhances the total pump laser absorption by keeping the average pump intensity below the saturation while minimizing the leakage from the cavity. A spectrally-selective reflection coating mitigates the effects of amplified spontaneous emission and parasitic lasing, which limit the power scaling for temperatures <140 K. Direct cooling of the entire clamshell and shielding stray fluorescence prevents adverse heating of the crystal from its surroundings. Finally, an improved Differential Luminescence Thermometry (DLT) technique is used to measure the crystal temperature with higher accuracy and precision.

Conference Presentation

Citation Download Citation

Jackson Kock, Azzurra Volpi, Alexander R. Albrecht, Duncan McGraw, Richard I. Epstein, and Mansoor Sheik-Bahae "Power scaling of Yb-based optical cryo-coolers", Proc. SPIE PC12018, Photonic Heat Engines: Science and Applications IV, PC1201803 (9 March 2022); https://doi.org/10.1117/12.2611600

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