Abstract

A reported correlation between defect-initiated pulsed laser damage and local predamage scatter in multilayer infrared mirror coatings has been analyzed in detail. Examination of a much larger data base confirms the previous result on dielectric-enhanced reflectors with polished substrates over a wide range of energy densities above the damage onset. Scatter signals from individual undamaged defects were detected using a focal spot that nearly coincides with the 150-μm- diam (D1/e2) focal spot of the He–Ne scatter probe with a damage frequency measurements (1-on-1) were made near normal or at damage-probe beam. Subsequent at 45° incidence with 100-ns pulses 2.7-μm wavelength. The correlation is characterized by an increase in damage frequency with increasing predamage scatter signal and by equivalence of the defect densities indicated by the two probes. Characteristics of the correlation are compared with a simple model based on focal spot intensity profiles. Conditions that limit correlation are discussed, including variable scatter from background scatter from defects and diamond-turned substrates. Results have implication for nondestructive defect detection and coating quality control.

© 1986 Optical Society of America

Full Article  |  PDF Article
Related Articles
Laser Induced Damage of Optical Elements–a Status Report

Alexander J. Glass and Arthur H. Guenther
Appl. Opt. 12(4) 637-649 (1973)

Laser Induced Damage to Optical Materials, 1973: a Conference Report

Alexander J. Glass and Arthur H. Guenther
Appl. Opt. 13(1) 74-88 (1974)

Laser Induced Damage in Optical Materials: 6th ASTM Symposium

Alexander J. Glass and Arthur H. Guenther
Appl. Opt. 14(3) 698-715 (1975)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (11)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (5)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (9)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription