Spot size and effective focal length measurements for a fast axial flow CO{sub 2} laser Metadata

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Title

  • Main Title Spot size and effective focal length measurements for a fast axial flow CO{sub 2} laser

Creator

  • Author: Steele, R.J.
    Creator Type: Personal
    Creator Info: Naval Air Warfare Center, China Lake, CA (United States)
  • Author: Fuerschbach, P.W.
    Creator Type: Personal
  • Author: MacCallum, D.O.
    Creator Type: Personal
    Creator Info: Sandia National Labs., Albuquerque, NM (United States)

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: USDOE, Washington, DC (United States)

Publisher

  • Name: Sandia National Laboratories
    Place of Publication: Albuquerque, New Mexico
    Additional Info: Sandia National Labs., Albuquerque, NM (United States)

Date

  • Creation: 1997-12-31

Language

  • English

Description

  • Content Description: An evaluation of the variation in focal plane position and spot size for a 1,650 W fast axial flow CO{sub 2} laser was performed. Multiple measurements of the focused beam were taken at stepped intervals along the beam axis to create a composite representation of the focus region. Measurements were made at several power levels from low to full power for each of five nominally identical lenses. It was found that as laser output power increases, the minimum focused spot radius increases, and the position of minimum focus shifts toward the laser resonator. These effects were attributed to observed variations in the diameter of the beam entering the focusing lens. For the ZnSe (f = 127 mm) lenses examined, variations in spot radius and focal plane position were seen. Lenses with high rated absorption had a larger variation in spot size and effective focal length than those with low absorption. Lenses that had previously been degraded by welding had the greatest variation.
  • Physical Description: 12 p.

Subject

  • Keyword: Process Control
  • Keyword: Beam Optics
  • Keyword: Carbon Dioxide Lasers
  • STI Subject Categories: 32 Energy Conservation, Consumption, And Utilization
  • Keyword: Experimental Data
  • Keyword: Laser Welding
  • Keyword: Laser Beam Machining
  • Keyword: Beam Profiles
  • Keyword: Evaluation
  • Keyword: Lenses

Source

  • Conference: 16. international congress on applications of laser and electro-optics, San Diego, CA (United States), 17-20 Nov 1997

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report

Format

  • Text

Identifier

  • Other: DE98005902
  • Report No.: SAND--97-1301C
  • Report No.: CONF-971149--
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/658456
  • Office of Scientific & Technical Information Report Number: 658456
  • Archival Resource Key: ark:/67531/metadc710942

Note

  • Display Note: OSTI as DE98005902