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Title: Fluorescent refrigeration

Abstract

Fluorescent refrigeration is based on selective radiative pumping, using substantially monochromatic radiation, of quantum excitations which are then endothermically redistributed to higher energies. Ultimately, the populated energy levels radiatively deexcite emitting, on the average, more radiant energy than was initially absorbed. The material utilized to accomplish the cooling must have dimensions such that the exciting radiation is strongly absorbed, but the fluorescence may exit the material through a significantly smaller optical pathlength. Optical fibers and mirrored glasses and crystals provide this requirement.

Inventors:
 [1];  [2];  [1];  [1]
  1. Santa Fe, NM
  2. Los Alamos, NM
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
870052
Patent Number(s):
5447032
Assignee:
Regents of University of California (Alameda, CA)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01S - DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT
F - MECHANICAL ENGINEERING F25 - REFRIGERATION OR COOLING F25B - REFRIGERATION MACHINES, PLANTS OR SYSTEMS
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
fluorescent; refrigeration; based; selective; radiative; pumping; substantially; monochromatic; radiation; quantum; excitations; endothermically; redistributed; energies; ultimately; populated; energy; levels; radiatively; deexcite; emitting; average; radiant; initially; absorbed; material; utilized; accomplish; cooling; dimensions; exciting; strongly; fluorescence; exit; significantly; optical; pathlength; fibers; mirrored; glasses; crystals; provide; requirement; energy level; optical fibers; radiant energy; optical fiber; optical path; exciting radiation; energy levels; monochromatic radiation; selective radiative; substantially monochromatic; material utilized; fluorescent refrigeration; /62/

Citation Formats

Epstein, Richard I, Edwards, Bradley C, Buchwald, Melvin I, and Gosnell, Timothy R. Fluorescent refrigeration. United States: N. p., 1995. Web.
Epstein, Richard I, Edwards, Bradley C, Buchwald, Melvin I, & Gosnell, Timothy R. Fluorescent refrigeration. United States.
Epstein, Richard I, Edwards, Bradley C, Buchwald, Melvin I, and Gosnell, Timothy R. Sun . "Fluorescent refrigeration". United States. https://www.osti.gov/servlets/purl/870052.
@article{osti_870052,
title = {Fluorescent refrigeration},
author = {Epstein, Richard I and Edwards, Bradley C and Buchwald, Melvin I and Gosnell, Timothy R},
abstractNote = {Fluorescent refrigeration is based on selective radiative pumping, using substantially monochromatic radiation, of quantum excitations which are then endothermically redistributed to higher energies. Ultimately, the populated energy levels radiatively deexcite emitting, on the average, more radiant energy than was initially absorbed. The material utilized to accomplish the cooling must have dimensions such that the exciting radiation is strongly absorbed, but the fluorescence may exit the material through a significantly smaller optical pathlength. Optical fibers and mirrored glasses and crystals provide this requirement.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {1}
}

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Works referenced in this record:

Optical Refrigeration in Nd-Doped Yttrium Aluminum Garnet
journal, October 1968