Optical refrigeration of payloads to T < 125 K
Abstract
A modified all-solid-state optical cryocooler prototype based on anti-Stokes fluorescence in a 10%-doped Yb:YLF crystal cooled a payload to temperatures below 125 K starting from room temperature. To achieve this record performance, the optical refrigerator employed a novel, to the best of our knowledge, textured-MgF2 thermal link to improve the thermal transport and fluorescence escape. Additionally, it used spectrally selective, high-reflection coatings in the pump circulator cavity to suppress parasitic lasing and amplified spontaneous emission.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 09, 2022
- Source ID
- 10.1364/ol.471369
Entities
People
- Alexander R Albrecht
- Jackson L. Kock
- Mansoor Sheik‐Bahae
- Richard I. Epstein
Organizations
- Air Force Office of Scientific Research
- Defense Advanced Research Projects Agency
- United States Army
- University of New Mexico