Method for changing the cross section of a laser beam

Sweatt, William C; Seppala, Lynn

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Title: Method for changing the cross section of a laser beam

Abstract

A technique is disclosed herein in which a circular optical beam, for example a copper vapor laser (CVL) beam, is converted to a beam having a profile other than circular, e.g. square or triangular. This is accomplished by utilizing a single optical mirror having a reflecting surface designed in accordance with a specifically derived formula in order to make the necessary transformation, without any substantial light loss and without changing substantially the intensity profile of the circular beam which has a substantially uniform intensity profile. In this way, the output beam can be readily directed into the dye cell of a dye laser.

Inventors:

Sweatt, William C ^[1]; Seppala, Lynn ^[2]

Albuquerque, NM
Livermore, CA

Issue Date:: Sun Jan 01 00:00:00 EST 1995

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

OSTI Identifier:: 870196

Patent Number(s):: 5473475

Assignee:: United States of America as represented by United States (Washington, DC)

Patent Classifications (CPCs):: G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS

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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G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
G02B27/09 - Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for {
G02B27/0911 - {Anamorphotic systems}
G02B27/0983 - {being curved}
G02B5/10 - with curved faces

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
H01S3/005 - {Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
H01S3/094034 - {the pumped medium being a dye}

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

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: method; changing; section; laser; beam; technique; disclosed; circular; optical; example; copper; vapor; cvl; converted; profile; square; triangular; accomplished; utilizing; single; mirror; reflecting; surface; designed; accordance; specifically; derived; formula; transformation; substantial; light; loss; substantially; intensity; uniform; output; readily; directed; dye; cell; uniform intensity; copper vapor; optical beam; vapor laser; dye laser; output beam; laser beam; substantially uniform; reflecting surface; intensity profile; dye cell; single optical; circular beam; circular optical; light loss; single optic; /359/372/

Citation Formats


                    Sweatt, William C, and Seppala, Lynn. Method for changing the cross section of a laser beam.  United States: N. p., 1995. 
        Web.

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                    Sweatt, William C, & Seppala, Lynn. Method for changing the cross section of a laser beam.  United States.

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                    Sweatt, William C, and Seppala, Lynn. Sun .  
        "Method for changing the cross section of a laser beam".  United States.  https://www.osti.gov/servlets/purl/870196.

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@article{osti_870196,

  title        = {Method for changing the cross section of a laser beam},

  author       = {Sweatt, William C and Seppala, Lynn},

  abstractNote = {A technique is disclosed herein in which a circular optical beam, for example a copper vapor laser (CVL) beam, is converted to a beam having a profile other than circular, e.g. square or triangular. This is accomplished by utilizing a single optical mirror having a reflecting surface designed in accordance with a specifically derived formula in order to make the necessary transformation, without any substantial light loss and without changing substantially the intensity profile of the circular beam which has a substantially uniform intensity profile. In this way, the output beam can be readily directed into the dye cell of a dye laser.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Sun Jan 01 00:00:00 EST 1995},

  month        = {Sun Jan 01 00:00:00 EST 1995}

}

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Works referenced in this record:

Diffractive Optical Elements For Use In Infrared Systems
journal, June 1989

Swanson, Gary J.; Veldkamp, Wilfrid B.
Optical Engineering, Vol. 28, Issue 6
https://doi.org/10.1117/12.7977008

Geometrical transformations in optics*
journal, January 1974

Bryngdahl, Olof
Journal of the Optical Society of America, Vol. 64, Issue 8
https://doi.org/10.1364/JOSA.64.001092

Holographic conversion of a Gaussian beam to a near-field uniform beam
journal, January 1991

Aleksoff, Carl C.
Optical Engineering, Vol. 30, Issue 5
https://doi.org/10.1117/12.55833

Transforming a circular laser beam into a square or trapezoid--almost
journal, January 1992

Sweatt, William C.
Optical Engineering, Vol. 31, Issue 2
https://doi.org/10.1117/12.56060

Strip Mirror Integrator For Laser Beam Uniformity On A Target
journal, August 1989

Geary, Joseph M.
Optical Engineering, Vol. 28, Issue 8
https://doi.org/10.1117/12.7977047

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Title: Method for changing the cross section of a laser beam

Abstract

Citation Formats

Diffractive Optical Elements For Use In Infrared Systems journal, June 1989

Geometrical transformations in optics* journal, January 1974

Holographic conversion of a Gaussian beam to a near-field uniform beam journal, January 1991

Transforming a circular laser beam into a square or trapezoid--almost journal, January 1992

Strip Mirror Integrator For Laser Beam Uniformity On A Target journal, August 1989

Diffractive Optical Elements For Use In Infrared Systems
journal, June 1989

Geometrical transformations in optics*
journal, January 1974

Holographic conversion of a Gaussian beam to a near-field uniform beam
journal, January 1991

Transforming a circular laser beam into a square or trapezoid--almost
journal, January 1992

Strip Mirror Integrator For Laser Beam Uniformity On A Target
journal, August 1989