Light intensification modeling of coating inclusions irradiated at 351 and 1053 nm.
Appl Opt
; 47(13): C162-6, 2008 May 01.
Article
in En
| MEDLINE
| ID: mdl-18449240
ABSTRACT
Electric-field modeling provides insight into the laser damage resistance potential of nodular defects. The laser-induced damage threshold for high-reflector coatings is 13x lower at the third harmonic (351 nm) than at the first harmonic (1053 nm) wavelength. Linear and multiphoton absorption increases with decreasing wavelength, leading to a lower-third harmonic laser resistance. Electric-field effects can also be a contributing mechanism to the lower laser resistance with decreasing wavelength. For suitably large inclusions, the nodule behaves as a microlens. The diffraction-limited spot size decreases with wavelength, resulting in an increase in intensity. Comparison of electric-field finite-element simulations illustrates a 3x to 16x greater light intensification at the shorter wavelength.
Search on Google
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Appl Opt
Year:
2008
Document type:
Article
Affiliation country: