Growth and Hardening of Alkali Halides for Use in Infrared Laser Windows

Abstract

KCl crystals pulled from pretreated melts under an Ti gettered inert atmosphere have been shown to have as low an absorption as crystals grown by the RAP Bridgman method. A simple optical method has been developed to analyze KCl:Eu for Eu content. Radiation damage significantly increases the 10.6 micrometers absorption of both KCl and NaCl. The absorption increase is caused by the F-aggregate centers. This result probably rules out the use of radiation strengthened KCl for high power laser window applications. The flow stress of KCl:Eu was found to increase linearly with Eu content. The flow stresses of KBr(x)Cl(1-x) crystals have the same temperature dependence as the flow stress of pure KCl.

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Document Details

Document Type
Technical Report
Publication Date
Jul 31, 1975
Accession Number
ADA017960

Entities

People

  • Charles T. Butler
  • Joel J. Martin
  • William A. Sibley

Organizations

  • Oklahoma State University–Stillwater

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Carbon Monoxide Lasers
  • Coefficients
  • Color Centers
  • Crystal Lattices
  • Crystallography
  • Crystals
  • Ionizing Radiation
  • Lasers
  • Materials
  • Measurement
  • Mechanical Properties
  • Optical Properties
  • Single Crystals
  • Spectra
  • Spectroscopy
  • Transitions

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers
  • Directed Energy - Pulsed-Laser Deposition