Optical apparatus for conversion of whispering-gallery modes into a free space gaussian like beam

Stallard, Barry W; Makowski, Michael A; Byers, Jack A

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Title: Optical apparatus for conversion of whispering-gallery modes into a free space gaussian like beam

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Abstract

An optical converter for efficient conversion of millimeter wavelength whispering-gallery gyrotron output into a linearly polarized, free-space Gaussian-like beam. The converter uses a mode-converting taper and three mirror optics. The first mirror has an azimuthal tilt to eliminate the k.sub..phi. component of the propagation vector of the gyrotron output beam. The second mirror has a twist reflector to linearly polarize the beam. The third mirror has a constant phase surface so the converter output is in phase.

Inventors:

Stallard, Barry W ^[1]; Makowski, Michael A ^[1]; Byers, Jack A ^[2]

Livermore, CA
Danville, CA

Issue Date:: 1992-01-01

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

OSTI Identifier:: 868302

Patent Number(s):: 5115482

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

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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 {
G02B27/0927 - {Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat}
G02B27/0977 - {Reflective elements}

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

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: optical; apparatus; conversion; whispering-gallery; modes; free; space; gaussian; beam; converter; efficient; millimeter; wavelength; gyrotron; output; linearly; polarized; free-space; gaussian-like; mode-converting; taper; mirror; optics; azimuthal; tilt; eliminate; phi; component; propagation; vector; twist; reflector; polarize; third; constant; phase; surface; optical apparatus; output beam; linearly polarized; free space; millimeter wavelength; millimeter wave; efficient conversion; third mirror; optical converter; space gaussian; /385/315/333/359/

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                    Stallard, Barry W, Makowski, Michael A, and Byers, Jack A. Optical apparatus for conversion of whispering-gallery modes into a free space gaussian like beam.  United States: N. p., 1992. 
        Web.

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                    Stallard, Barry W, Makowski, Michael A, & Byers, Jack A. Optical apparatus for conversion of whispering-gallery modes into a free space gaussian like beam.  United States.

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                    Stallard, Barry W, Makowski, Michael A, and Byers, Jack A. Wed .  
        "Optical apparatus for conversion of whispering-gallery modes into a free space gaussian like beam".  United States.  https://www.osti.gov/servlets/purl/868302.

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@article{osti_868302,

  title        = {Optical apparatus for conversion of whispering-gallery modes into a free space gaussian like beam},

  author       = {Stallard, Barry W and Makowski, Michael A and Byers, Jack A},

  abstractNote = {An optical converter for efficient conversion of millimeter wavelength whispering-gallery gyrotron output into a linearly polarized, free-space Gaussian-like beam. The converter uses a mode-converting taper and three mirror optics. The first mirror has an azimuthal tilt to eliminate the k.sub..phi. component of the propagation vector of the gyrotron output beam. The second mirror has a twist reflector to linearly polarize the beam. The third mirror has a constant phase surface so the converter output is in phase.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1992},

  month        = {1}

}

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Optical apparatus for conversion of whispering-gallery modes into a free space gaussian like beam

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An optical converter for efficient conversion of millimeter wavelength whispering-gallery gyrotron output into a linearly polarized, free-space Gaussian-like beam is described. The converter uses a mode-converting taper and three mirror optics. The first mirror has an azimuthal tilt to eliminate the k[sub [phi]] component of the propagation vector of the gyrotron output beam. The second mirror has a twist reflector to linearly polarize the beam. The third mirror has a constant phase surface so the converter output is in phase. 20 figs.
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