OSE PHD Student, Jackson Kock Presents Paper on Power scaling of Yb-based optical cryo-coolers

Departmental News

Posted: January 25, 2022

The OSE Program at Photonics West 2022

OSE PHD Student, Jackson Kock Presents Paper on Power scaling of Yb-based optical cryo-coolers

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.

Link to Photonics West 2022 Program: https://spie.org/conferences-and-exhibitions/photonics-west

Link to Upcoming 2022 Optics Conferences: https://optics.unm.edu/conferences/conference-2022.html