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Title: Thin planar package for cooling an array of edge-emitting laser diodes

Abstract

A laser diode array is disclosed that includes a plurality of planar assemblies and active cooling of each assembly. The laser diode array may be operated in a long duty cycle, or in continuous operation. A laser diode bar and a microchannel heat sink are thermally coupled in a compact, thin planar assembly having the laser diode bar located proximate to one edge. In an array, a number of such thin planar assemblies are secured together in a stacked configuration, in close proximity so that the laser diodes are spaced closely. The cooling means includes a microchannel heat sink proximate to the laser diode bar to absorb heat generated by laser operation. To provide the coolant to the microchannels, each thin planar assembly comprises passageways that connect the microchannels to inlet and outlet corridors. Each inlet passageway may comprise a narrow slot that directs coolant into the microchannels and increases the velocity of flow therethrough. The corridors comprises holes extending through each of the assemblies in the array. The inlet and outlet corridors are connected to a conventional coolant circulation system. The laser diode array with active cooling has applications as an optical pump for high power solid state lasers,more » or by mating the diodes with fiber optic lenses. Further, the arrays can be useful in applications having space constraints and energy limitations, and in military and space applications. The arrays can be incorporated in equipment such as communications devices and active sensors.« less

Inventors:
 [1];  [2]
  1. (Stockton, CA)
  2. (Livermore, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
868246
Patent Number(s):
5105430
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
planar; package; cooling; array; edge-emitting; laser; diodes; diode; disclosed; plurality; assemblies; active; assembly; operated; duty; cycle; continuous; operation; bar; microchannel; heat; sink; thermally; coupled; compact; located; proximate; edge; secured; stacked; configuration; close; proximity; spaced; closely; means; absorb; generated; provide; coolant; microchannels; comprises; passageways; connect; inlet; outlet; corridors; passageway; comprise; narrow; slot; directs; increases; velocity; flow; therethrough; holes; extending; connected; conventional; circulation; applications; optical; pump; power; solid; lasers; mating; fiber; optic; lenses; arrays; useful; space; constraints; energy; limitations; military; incorporated; equipment; communications; devices; sensors; stacked configuration; space applications; active cooling; power solid; diode bar; optical pump; laser operation; laser diodes; assembly comprises; cooling means; continuous operation; close proximity; heat sink; fiber optic; laser diode; diode array; duty cycle; heat generated; flow therethrough; thermally coupled; microchannel heat; space constraints; planar package; spaced close; spaced closely; emitting laser; inlet passage; active sensors; located proximate; channel heat; optic lens; narrow slot; coolant circulation; optic lenses; holes extending; /372/

Citation Formats

Mundinger, David C., and Benett, William J. Thin planar package for cooling an array of edge-emitting laser diodes. United States: N. p., 1992. Web.
Mundinger, David C., & Benett, William J. Thin planar package for cooling an array of edge-emitting laser diodes. United States.
Mundinger, David C., and Benett, William J. Wed . "Thin planar package for cooling an array of edge-emitting laser diodes". United States. https://www.osti.gov/servlets/purl/868246.
@article{osti_868246,
title = {Thin planar package for cooling an array of edge-emitting laser diodes},
author = {Mundinger, David C. and Benett, William J.},
abstractNote = {A laser diode array is disclosed that includes a plurality of planar assemblies and active cooling of each assembly. The laser diode array may be operated in a long duty cycle, or in continuous operation. A laser diode bar and a microchannel heat sink are thermally coupled in a compact, thin planar assembly having the laser diode bar located proximate to one edge. In an array, a number of such thin planar assemblies are secured together in a stacked configuration, in close proximity so that the laser diodes are spaced closely. The cooling means includes a microchannel heat sink proximate to the laser diode bar to absorb heat generated by laser operation. To provide the coolant to the microchannels, each thin planar assembly comprises passageways that connect the microchannels to inlet and outlet corridors. Each inlet passageway may comprise a narrow slot that directs coolant into the microchannels and increases the velocity of flow therethrough. The corridors comprises holes extending through each of the assemblies in the array. The inlet and outlet corridors are connected to a conventional coolant circulation system. The laser diode array with active cooling has applications as an optical pump for high power solid state lasers, or by mating the diodes with fiber optic lenses. Further, the arrays can be useful in applications having space constraints and energy limitations, and in military and space applications. The arrays can be incorporated in equipment such as communications devices and active sensors.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

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