CO/sub 2/-laser polishing of fused silica surfaces for increased laser damage resistance at 1. 06. mu. m

Temple, P A; Milam, D; Lowdermilk, W H

Title: CO/sub 2/-laser polishing of fused silica surfaces for increased laser damage resistance at 1. 06. mu. m

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Abstract

Bare fused silica surfaces were prepared by subjecting the mechanically polished surface to a rastered cw CO/sub 2/ laser beam. Analysis shows that this processing causes: (a) removal of a uniform layer of fused silica; and (b) a probable re-fusing or healing of existing subsurface fractures. The fused silica removal rate is found to be a function of the laser intensity and scan rate. These surfaces are seen to have very low scatter and to be very smooth. In addition, they have exhibited entrance surface damage thresholds at 1.06 ..mu..m, and 1 nsec, which are substantially above those seen on the mechanically polished surface. When damage does occur, it tends to be at a few isolated points rather than the general uniform damage seen on the mechanicaly polished part. In addition to the damage results, we will discuss an observational technique used for viewing these surfaces which employs dark-field illumination.

Authors:: Temple, P A; Milam, D; Lowdermilk, W H

Publication Date:: Thu Apr 03 00:00:00 EST 1980

Research Org.:: Naval Weapons Center, China Lake, CA (USA). Michelson Labs.; California Univ., Livermore (USA). Lawrence Livermore Lab.

OSTI Identifier:: 5504111

Report Number(s):: UCRL-84247; CONF-7910130-2
TRN: 80-008022

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

Resource Type:: Conference

Resource Relation:: Conference: Boulder damage conference, Boulder, CO, USA, Oct 1979

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; SILICON OXIDES; SURFACE FINISHING; CARBON DIOXIDE; LASER-RADIATION HEATING; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; POLISHING; SURFACES; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; HEATING; OXIDES; OXYGEN COMPOUNDS; PLASMA HEATING; SILICON COMPOUNDS; 360204* - Ceramics, Cermets, & Refractories- Physical Properties

Citation Formats


                    Temple, P A, Milam, D, and Lowdermilk, W H. CO/sub 2/-laser polishing of fused silica surfaces for increased laser damage resistance at 1. 06. mu. m.  United States: N. p., 1980. 
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                    Temple, P A, Milam, D, & Lowdermilk, W H. CO/sub 2/-laser polishing of fused silica surfaces for increased laser damage resistance at 1. 06. mu. m.  United States.

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                    Temple, P A, Milam, D, and Lowdermilk, W H. 1980.  
        "CO/sub 2/-laser polishing of fused silica surfaces for increased laser damage resistance at 1. 06. mu. m".  United States.  https://www.osti.gov/servlets/purl/5504111.

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@article{osti_5504111,

  title        = {CO/sub 2/-laser polishing of fused silica surfaces for increased laser damage resistance at 1. 06. mu. m},

  author       = {Temple, P A and Milam, D and Lowdermilk, W H},

  abstractNote = {Bare fused silica surfaces were prepared by subjecting the mechanically polished surface to a rastered cw CO/sub 2/ laser beam. Analysis shows that this processing causes: (a) removal of a uniform layer of fused silica; and (b) a probable re-fusing or healing of existing subsurface fractures. The fused silica removal rate is found to be a function of the laser intensity and scan rate. These surfaces are seen to have very low scatter and to be very smooth. In addition, they have exhibited entrance surface damage thresholds at 1.06 ..mu..m, and 1 nsec, which are substantially above those seen on the mechanically polished surface. When damage does occur, it tends to be at a few isolated points rather than the general uniform damage seen on the mechanicaly polished part. In addition to the damage results, we will discuss an observational technique used for viewing these surfaces which employs dark-field illumination.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/5504111},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Thu Apr 03 00:00:00 EST 1980},

  month        = {Thu Apr 03 00:00:00 EST 1980}

}

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