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Title: Efficient method for the measurement of lifetime optical damage performance of thin film coatings from laser damage size analysis

Authors:
;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1374478
Grant/Contract Number:
15-ERD-057; AC52-07NA27344
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Optics Letters
Additional Journal Information:
Journal Volume: 42; Journal Issue: 16; Related Information: CHORUS Timestamp: 2017-08-09 09:40:05; Journal ID: ISSN 0146-9592
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English

Citation Formats

Elhadj, Selim, and Yoo, Jae Hyuck. Efficient method for the measurement of lifetime optical damage performance of thin film coatings from laser damage size analysis. United States: N. p., 2017. Web. doi:10.1364/OL.42.003153.
Elhadj, Selim, & Yoo, Jae Hyuck. Efficient method for the measurement of lifetime optical damage performance of thin film coatings from laser damage size analysis. United States. doi:10.1364/OL.42.003153.
Elhadj, Selim, and Yoo, Jae Hyuck. 2017. "Efficient method for the measurement of lifetime optical damage performance of thin film coatings from laser damage size analysis". United States. doi:10.1364/OL.42.003153.
@article{osti_1374478,
title = {Efficient method for the measurement of lifetime optical damage performance of thin film coatings from laser damage size analysis},
author = {Elhadj, Selim and Yoo, Jae Hyuck},
abstractNote = {},
doi = {10.1364/OL.42.003153},
journal = {Optics Letters},
number = 16,
volume = 42,
place = {United States},
year = 2017,
month = 8
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on August 9, 2018
Publisher's Accepted Manuscript

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  • The role of thin-film interfaces in the near-ultraviolet absorption and pulsed-laser–induced damage was studied for ion-beam–sputtered and electron-beam–evaporated coatings comprised from HfO 2 and SiO 2 thin-film pairs. To separate contributions from the bulk of the film and from interfacial areas, absorption and damage-threshold measurements were performed for a one-wave (355-nm wavelength) thick, HfO 2 single-layer film and for a film containing seven narrow HfO 2 layers separated by SiO 2 layers. The seven-layer film was designed to have a total optical thickness of HfO 2 layers, equal to one wave at 355 nm and an E-field peak and averagemore » intensity similar to a single-layer HfO 2 film. Absorption in both types of films was measured using laser calorimetry and photothermal heterodyne imaging. The results showed a small contribution to total absorption from thin-film interfaces, as compared to HfO 2 film material. The relevance of obtained absorption data to coating near-ultraviolet, nanosecond-pulse laser damage was verified by measuring the damage threshold and characterizing damage morphology. The results of this study revealed a higher damage resistance in the seven-layer coating as compared to the single-layer HfO 2 film in both sputtered and evaporated coatings. Here, the results are explained through the similarity of interfacial film structure with structure formed during the co-deposition of HfO 2 and SiO 2 materials.« less
  • Time resolved reflectivity measurements of thin aluminum films undergoing damage by picosecond laser pulses are described. Experimental results are compared with results from reflectance calculations using the model of hydrodynamic expansion of a metal layer heated by a short laser pulse. Both experimental and theoretical results confirm that thin metal films are useful as damageable optical elements in an optical power limiting device. {copyright} {ital 1996 Society of Photo{minus}Optical Instrumentation Engineers.}
  • We have investigated the influence of laser beam size on laser-induced damage threshold (LIDT) in the case of single- and multiple-shot irradiation. The study was performed on hafnia thin films deposited with various technologies (evaporation, sputtering, with or without ion assistance). LIDT measurements were carried out at 1064 nm and 12 ns with a spot size ranging from a few tens to a few hundreds of micrometers, in 1-on-1 and R-on-1 modes. These measurements were compared with simulations obtained with the statistical theory of laser-induced damage caused by initiating inclusions.
  • This document has been prepared in the interest of aiding optical designers select laser damage resistant coatings for optical elements to be employed in military systems using lasers or encountering lasers used as weapons or countermeasures. It provides an extensive data base of damage thresholds for oxide, fluoride and chalcogenide single layer and multilayer coatings. The data base is supported by a detailed description of how the coatings were synthesized and how the measurements were performed to collect the damage threshold data. The basis from which the information was collected covers a period from 1984 through 1989. The material reviewedmore » includes investigation of causes of damage in optical coatings and approaches to reducing or eliminating damage mechanisms with the objective of raising damage thresholds. The information should be found useful in selecting coating materials and techniques for their synthesis or as a tool in evaluating the susceptibility of existing coated optical elements.« less
  • Laser induced damage in optical coatings is a complicated problem, which is attributed to a lot of factors including environment parameters, laser parameters and thin film production parameters. Among the three factors, production parameters interest us most. We produce a series of samples with different roughness levels of the substrates, thin film material and vacuum environment within the chamber, etc. Using 1.06 {mu}m Nd-YAG laser as our test laser, we make 1-on-1 laser damage test to these samples. Some interesting phenomena are found. We calculate the laser induced local heating within the thin film multilayers, and make analysis to themore » experimental phenomena. Conclusions are given.« less