Compact and highly efficient laser pump cavity

Chang, Jim J; Bass, Isaac L; Zapata, Luis E

Title: Compact and highly efficient laser pump cavity

Abstract

A new, compact, side-pumped laser pump cavity design which uses non-conventional optics for injection of laser-diode light into a laser pump chamber includes a plurality of elongated light concentration channels. In one embodiment, the light concentration channels are compound parabolic concentrators (CPC) which have very small exit apertures so that light will not escape from the pumping chamber and will be multiply reflected through the laser rod. This new design effectively traps the pump radiation inside the pump chamber that encloses the laser rod. It enables more uniform laser pumping and highly effective recycle of pump radiation, leading to significantly improved laser performance. This new design also effectively widens the acceptable radiation wavelength of the diodes, resulting in a more reliable laser performance with lower cost.

Inventors:

Chang, Jim J ^[1]; Bass, Isaac L ^[2]; Zapata, Luis E ^[3]

Dublin, CA
Castro Valley, CA
Livermore, CA

Issue Date:: 1999-01-01

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

OSTI Identifier:: 872637

Patent Number(s):: 5978407

Assignee:: United States Enrichment Corporation (Bethesda, MD)

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

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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
H01S3/061 - {with elliptical or circular cross-section and elongated shape, e.g. rod}
H01S3/0941 - of a laser diode
H01S3/094084 - {with pump light recycling, i.e. with reinjection of the unused pump light, e.g. by reflectors or circulators}
H01S3/094057 - {by tapered duct or homogenized light pipe, e.g. for concentrating pump light}
H01S3/0407 - {Liquid cooling, e.g. by water}
H01S3/025 - {of solid state lasers, e.g. housings or mountings}

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DOE Contract Number:: W-7405-ENG-48

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: compact; highly; efficient; laser; pump; cavity; side-pumped; design; non-conventional; optics; injection; laser-diode; light; chamber; plurality; elongated; concentration; channels; embodiment; compound; parabolic; concentrators; cpc; exit; apertures; escape; pumping; multiply; reflected; rod; effectively; traps; radiation; inside; encloses; enables; uniform; effective; recycle; leading; significantly; improved; performance; widens; acceptable; wavelength; diodes; resulting; reliable; cost; significantly improved; laser rod; laser pumping; highly efficient; highly effective; pumped laser; exit aperture; laser pump; uniform laser; laser performance; pump radiation; pumping chamber; improved laser; radiation wavelength; pump cavity; pump chamber; cavity design; compound parabolic; parabolic concentrator; effectively traps; efficient laser; significantly improve; conventional optics; /372/

Citation Formats


                    Chang, Jim J, Bass, Isaac L, and Zapata, Luis E. Compact and highly efficient laser pump cavity.  United States: N. p., 1999. 
        Web.

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                    Chang, Jim J, Bass, Isaac L, & Zapata, Luis E. Compact and highly efficient laser pump cavity.  United States.

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                    Chang, Jim J, Bass, Isaac L, and Zapata, Luis E. Fri .  
        "Compact and highly efficient laser pump cavity".  United States.  https://www.osti.gov/servlets/purl/872637.

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@article{osti_872637,

  title        = {Compact and highly efficient laser pump cavity},

  author       = {Chang, Jim J and Bass, Isaac L and Zapata, Luis E},

  abstractNote = {A new, compact, side-pumped laser pump cavity design which uses non-conventional optics for injection of laser-diode light into a laser pump chamber includes a plurality of elongated light concentration channels. In one embodiment, the light concentration channels are compound parabolic concentrators (CPC) which have very small exit apertures so that light will not escape from the pumping chamber and will be multiply reflected through the laser rod. This new design effectively traps the pump radiation inside the pump chamber that encloses the laser rod. It enables more uniform laser pumping and highly effective recycle of pump radiation, leading to significantly improved laser performance. This new design also effectively widens the acceptable radiation wavelength of the diodes, resulting in a more reliable laser performance with lower cost.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1999},

  month        = {1}

}

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Works referenced in this record:

High-power high-efficient diode-side-pumped Nd: YAG laser
conference, January 1997

Fujikawa, Shuichi; Kojima, Tetsuo; Yasui, Koji
Advanced Solid State Lasers
https://doi.org/10.1364/ASSL.1997.HP6

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Title: Compact and highly efficient laser pump cavity

Abstract

Citation Formats

High-power high-efficient diode-side-pumped Nd: YAG laser conference, January 1997

High-power high-efficient diode-side-pumped Nd: YAG laser
conference, January 1997