Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Temperature dependence of absorptance in laser damage of metallic mirrors: I. Melting

Not Accessible

Your library or personal account may give you access

Abstract

Naval Weapons Center damage thresholds for ultraclean metals (45 J/cm2, 100 ns, 10.6 μm, Cu) are a milestone in laser-damage studies, being reproducible, with no isolated-spot damage, and showing the first excellent agreement (∼ 15%) with a first-principles theory (developed here) for any metal or transparent material. An exact premelting temperature result for the case of optical absorptance A = Ai + A1Ts indicates that the surface-temperature rise Ts reduces the theoretical threshold (Itp)m for raising Ts to the melting temperature Tm by a factor of 3.6 to 1.6, typically. Raising Ts to Tm is a good damage criterion for 100-ns pulses, but not for single subnanosecond pulses. The previous scaling Itptp1/2/A is invalid in general, but Itptp1/2 is valid for (Itp)m even with A = Ai + A1Ts. Approximating a Gaussian I(t) pulse by a square pulse makes (Itp)m 17% too small in the constant-A approximation.

© 1979 Optical Society of America

Full Article  |  PDF Article
More Like This
Temperature variation of total hemispherical emissivity of stainless steel AISI 304

C. R. Roger, S. H. Yen, and K. G. Ramanathan
J. Opt. Soc. Am. 69(10) 1384-1390 (1979)

Laser induced damage in optical materials: tenth ASTM symposium

Alexander J. Glass and Arthur H. Guenther
Appl. Opt. 18(13) 2112-2129 (1979)

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 Optica member, or as an authorized user of your institution.

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

Figures (8)

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

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

Tables (3)

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

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

Equations (59)

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

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

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved