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Title: Methods and apparatus for comprehensive characterization of performance attributes and damage thresholds of ultrafast laser optics

Journal Article · · Optical Engineering
 [1];  [2];  [2]
  1. Univ. of Rochester, NY (United States); Laboratory for Laser Energetics, University of Rochester
  2. Univ. of Rochester, NY (United States)
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It is presently well understood that the operational performance limits of optics are determined by three fundamental attributes: the initiation of laser-induced damage, the growth of damage sites, and the transient (nondamaging) modification of optical parameters. The comprehensive characterization of the performance limitations of ultrafast optics requires consideration of all three fundamental attributes. Here, the vast majority of literature to date, however, has focused primarily on damage-initiation and testing systems that are largely focused on determining the damage-initiation threshold under single- and multipulse excitation. In this work, we discuss a testing apparatus that was designed to offer the capability to adequately characterize all three of these performance attributes under femtosecond, near-infrared laser irradiation. Key aspects of methodology are discussed, including high-dynamic-range energy control, variable beam size, wavelength tunability, B-integral management, and functional performance characterization to explore the true operational limits of the components. Example results for a metal-dielectric mirror demonstrate the test station’s operation.

Research Organization:
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003856
OSTI ID:
1875661
Report Number(s):
1726; 2022-27; 2687; 2022-27; 1726; 2686
Journal Information:
Optical Engineering, Journal Name: Optical Engineering Journal Issue: 07 Vol. 61; ISSN 0091-3286
Publisher:
SPIECopyright Statement
Country of Publication:
United States
Language:
English

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LIDT testing
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femtosecond damage testing
femtosecond lasers
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