Investigations into the Feasibility of High Power Laser Window Materials

Abstract

A test facility is being constructed for testing laser window material. This will use the focused beam from a 15 kW CW laser at 10.6 micrometers or other available lasers. Provision for cooling the window is included and also instrumentation for measuring optical and mechanical effects. Forty-seven natural diamonds have been tested to find the correlation between the UV absorption spectrum, the IR absorption spectrum and the absorption coefficient beta at 10.6 micrometets. Transparency at .253 micrometer is roughly correlated with low values of beta. A water cooled diamond window holder is described. A specimen of single crystal CaF2 and another of pressure induced recrystalized CaF2 were exposed to a 20 joule, 5 microsec 6.7 x 10 to the 7th power watt/sq cm pulse of 2.8 micrometer laser radiation with no apparent damage.

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Document Details

Document Type
Technical Report
Publication Date
Apr 15, 1975
Accession Number
ADA012290

Entities

People

  • Jacob L. Zar

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Coefficients
  • Absorption Spectra
  • Air Force
  • Coefficients
  • Contracts
  • Distortion
  • Heat Transfer
  • Laser Beams
  • Lasers
  • Materials
  • Measurement
  • Mechanical Properties
  • Physical Properties
  • Radiation
  • Spectra
  • Test Facilities

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Pulsed Power and Plasma Physics.
  • Spectroscopy.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers