Multithreshold Measurement and Analysis of Pulsed Laser Damage on Optical Surfaces

Abstract

The methodology of multithreshold analysis, a new approach to laser-damage research, is described. The comparison of thresholds for various damage-related effects identifies dominant failure mechanisms and provides better guidance for laser-materials technology. After a brief description of apparatus, the procedure for routinely measuring up to eight different thresholds per sample is given. The maximum-likelihood principle is used to derive an algorithm for computing thresholds and standard deviations. The use of a standard gold sample to verify reproducibility and to maintain long-term calibration is discussed. Examples of multithreshold results on uncoated and coated infrared optical components are presented. The following are some of the effects for which thresholds are compared: slip, roughening, cracking, pits, melting, craters, delamination of coatings, ion and light emission, and work function change.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1977
Accession Number
ADA051141

Entities

People

  • J. L. Jernigan
  • J. O. Porteus
  • W. N. Faith

Organizations

  • Naval Air Weapons Station China Lake

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Calibration
  • Coatings
  • Data Reduction
  • Failure Mode And Effect Analysis
  • Laser Beams
  • Laser Damage
  • Laser Materials
  • Materials
  • Measurement
  • Military Research
  • Optical Coatings
  • Optical Materials
  • Pulsed Lasers
  • Standards
  • United States
  • Work Functions

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Optical Physics and Photonics.
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Directed Energy