First demonstration of an all-solid-state optical cryocooler  

作　　者：Markus P.Hehlen Junwei Meng Alexander R.Albrecht Eric R.Lee Aram Gragossian Steven P.Love Christopher E.Hamilton Richard I.Epstein Mansoor Sheik-Bahae 

机构地区：[1]Los Alamos National Laboratory,P.O.Box 1663,Los Alamos,NM 87545,USA [2]Department of Physics&Astronomy,University of New Mexico,Albuquerque,NM 87131,USA

出　　处：《Light(Science & Applications)》2018年第1期922-931,共10页光（科学与应用)（英文版）

基　　金：supported by the Air Force Office of Scientific Research(AFOSR)under award numbers FA9550-15-1-024 and FA9550-16-1-0362(MURI).

摘　　要：Solid-state optical refrigeration uses anti-Stokes fluorescence to cool macroscopic objects to cryogenic temperatures without vibrations.Crystals such as Yb3+-doped YLiF4(YLF:Yb)have previously been laser-cooled to 91 K.In this study,we show for the first time laser cooling of a payload connected to a cooling crystal.A YLF:Yb crystal was placed inside a Herriott cell and pumped with a 1020-nm laser(47 W)to cool a HgCdTe sensor that is part of a working Fourier Transform Infrared(FTIR)spectrometer to 135 K.This first demonstration of an all-solid-state optical cryocooler was enabled by careful control of the various desired and undesired heat flows.Fluorescence heating of the payload was minimized by using a single-kink YLF thermal link between the YLF:Yb cooling crystal and the copper coldfinger that held the HgCdTe sensor.The adhesive-free bond between YLF and YLF:Yb showed excellent thermal reliability.This laser-cooled assembly was then supported by silica aerogel cylinders inside a vacuum clamshell to minimize undesired conductive and radiative heat loads from the warm surroundings.Our structure can serve as a baseline for future optical cryocooler devices.

关 键 词：OPTICAL PUMPED DESIRED 

分 类 号：TN2[电子电信—物理电子学]