Comparison of simultaneous on-line optical and acoustic laser damage detection methods in the nanosecond pulse duration domain

T. Somoskoi, C. Vass, M. Mero, R. Mingesz, Z. Bozóki, K. Osvay

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We carried out single-shot laser-induced damage threshold measurements on dielectric high reflectors guided by the corresponding ISO standard. Four simultaneous on-line detection techniques were tested and compared using 532 nm, 9 ns and 266 nm, 6 ns laser pulses. Two methods, microscope aided visual inspection and detection of scattered light off the damaged surface, were based on optical signals. The other two techniques exploited the acoustic waves accompanying a damage event in ambient air and in the substrate by a microphone and a piezoelectric sensor, respectively. A unified criterion based on the statistical analysis of the detector signals was applied to assign an objective and unambiguous damage threshold value for all of our diverse detection methods. Microscope aided visual inspection showed the lowest damage thresholds for both wavelengths. However, the sensitivity of the other three techniques proved to be only slightly lower.

Original languageEnglish
Article number056002
JournalLaser Physics
Volume25
Issue number5
DOIs
Publication statusPublished - May 1 2015

Fingerprint

Laser damage
laser damage
Damage detection
yield point
pulse duration
Microscopes
Inspection
Acoustics
acoustics
inspection
Microphones
microscopes
signal detectors
Laser pulses
Statistical methods
Acoustic waves
Detectors
microphones
Wavelength
statistical analysis

Keywords

  • laser damage
  • light scattering
  • photoacoustic
  • probability density estimation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Industrial and Manufacturing Engineering

Cite this

Comparison of simultaneous on-line optical and acoustic laser damage detection methods in the nanosecond pulse duration domain. / Somoskoi, T.; Vass, C.; Mero, M.; Mingesz, R.; Bozóki, Z.; Osvay, K.

In: Laser Physics, Vol. 25, No. 5, 056002, 01.05.2015.

Research output: Contribution to journalArticle

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