SPIE Laser Damage 2018 Conference

Країна: США

Місто: Boulder

Тези до: 18.04.2018

Дати: 23.09.18 — 26.09.18

Е-мейл Оргкомітету: https://spie.org/Account/Login/signon?redir=/submissions/submit/Overview.aspx%3fEventID%3d2318491

Організатори: SPIE


SPIE Laser Damage 2018, where scientists and engineers present the latest research on high-power/high-energy lasers as well as materials and thin films, durability, properties modeling, testing, and component fabrication. 

SPIE Laser Damage covers the core technologies affecting your work. See how advances revealed at the meeting directly influence your research. Participate in these sessions:

•     Materials and Measurement
•     Surfaces, Mirrors, and Contamination
•     Thin Films
•     Fundamental Mechanisms
•     Tutorial on Femtosecond Laser Damage
•     Mini-Symposium on Frontiers of Ultrafast Science
•     Thin Film Damage Competitions

Submissions are solicited for the four core technical sessions and the Mini Symposium.

Materials and Measurements
Damage to the bulk of transparent optical media can occur in amorphous, polymeric, polycrystalline or crystalline materials. Research into, and measurements of phenomena that influence the damage process, such as absorption, thermal conductivity, stress-optic coefficients, moduli and defects are reported, as well as damage testing on bulk materials. With the emergence of micro- and nanostructured materials, especially those used in fiber laser systems and photonic crystal structures, the relationship between the propagating laser flux and engineered defects becomes even more important.
Keynote Presentation: “Standards on Laser-Induced Damage”, Detlev Ristau, Laser Zentrum Hannover (Germany)

Surfaces, Mirrors, and Contamination
Optical surfaces often limit the fluence of an optic due to intrinsic and extrinsic flaws and defects. Proper surface preparation, subsurface damage control, roughness and scattering reduction, environmental degradation and aging prevention, contamination control, can all improve the performance of mirrors and other surfaces.
Invited Presentation: “Getting a high-power UV laser into space: The story of the Aladin laser development for the European Space Agency's Aeolus satellite”, Denny Wernham, European Space Agency (Germany)

Thin Films
Because of the tremendous range of applications of optical multilayers for modifying the performance of optical measurements, and because thin films are generally the weakest part of optical systems, research into more damage-resistant thin films is a vibrant area. In addition to damage thresholds or sensitivity, researchers are interested in advanced film-deposition technology, contamination, film structure, film design, and film response to environmental attack and aging, including hardness and abrasion resistance.
Keynote Presentation: “Recent advances on light matter interaction in layered media”, Michel Lequime, Institut Fresnel (France)

Fundamental Mechanisms
Topics range from the basics of photon-matter interaction to methods of test procedures and data reduction to systems considerations. Emphasis is on nonlinear behavior; for example, multiphoton effects, nonlinear refractive index, and self-focusing. This area also includes modeling, such as thermal behavior of defect-initiated damage and the interplay between elements in an optical train that affect performance and hence damage.
Keynote Presentation: Peter Herman, Univ. of Toronto (Canada)

Mini-Symposium on 50th Anniversary Conference Overview
Chaired by: MJ Soileau, Univ. of Central Florida (USA) and Woldgang Rudolph, The Univ. of New Mexico (USA)
This Mini-Symposium is devoted to the overview of the conference progress, history, and contribution to the research worldwide as well as to overview of the current state in the fields of research directly related to the major topics of the conference: fundamentals of laser-matter interactions, thin films, measurements of laser-damage thresholds, characterization of optical materials for high-power / high-energy lasers. This event hosts overview invited talks of leading experts and long-term contributors to the field, for example:
Alex Glass Lawrence Livermore National Labs. (retired) (USA) "Reflections on 50 Years of Laser Damage"
Martin Stickley DARPA/AFCRL, BDM International, CREOL/Univ. of Central Florida (retired) (USA) "The Laser Damage Meeting: The Early Years"
Christopher Stoltz, Lawrence Livermaore National Labs. (USA) “After 10 years of the International Thin Film Competition, what have we learned”
Scott Diddams, NIST (USA) "The history and presence of high-resolution laser spectroscopy and its applications"

Tutorial on Laser Beam Characterization
Chaired by: Bernd Eppich, Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, and BeamXpert GmbH (Germany)
This tutorial is focused on overview of principles, approaches, and methods of characterization of laser beams. Measurements of beam quality, diameter of laser spot on target surface, and other laser-beam parameters are inevitable for accurate measurements of laser-damage thresholds. This tutorial covers those topics to educate the next generation of laser-damage research community.

1064-nm Mirror Thin Film Damage Competition
Coordinated by: Raluca A. Negres, Christopher J. Stolz, Lawrence Livermore National Lab. (USA)

A double-blind laser damage competition will be held to determine the current nanosecond laser damage resistance of 1064-nm, 0 degree multilayer mirrors over the last ten years since the 2008 initial launch of this thin film damage competition with mirrors of the same specifications.. The results will be shared at SPIE Laser Damage 2018. The mirrors must meet the following requirements:

  • Reflectance < 99.5%
  • Wavelength 1064 nm
  • 0 degrees incidence angle
  • Pulse length 5-ns; Single-longitudinal mode laser; Repetition rate 10 Hz
  • Environment: Ambient air (normal and low humidity possible)
  • No wavefront or stress requirement
  • No surface quality requirement.

The coatings shall be deposited on glass substrates provided by the coating supplier; it is highly desired to have a polished rear surface. The dimensions of the substrate shall be 50 mm (+/- 1 mm) in diameter and at least 10 mm thick. Samples must be received by June 1, 2018 to the following address:

Raluca Negres, L-470
Lawrence Livermore National Laboratory
7000 East Avenue
Livermore, CA 94550

Each sample will be assigned a unique label to maintain anonymity. The origin of the samples will not be released to the damage testing service and also will not be published at the Laser Damage Symposium or within the proceedings. A summary of the results will be published in the conference proceedings. Coating suppliers will be informed of the measured results and relative ranking within the submitted population. In order to minimize the number of damage tests, no more than two different samples can be submitted from each coating supplier.

In addition to the sample, the coating supplier MUST also supply the following information:

  • Coating materials and number of layers
  • Reflectance or transmission spectral scan (prefer in an electronic format) from ~900-1200nm.

Spectral scans may be emailed to negres2@llnl.gov

  • A brief description of the deposition method (e-beam, IAD, IBS, plasma assist, etc.)
  • Substrate material and cleaning method.

Failure to provide the required information will result in sample disqualification. If two samples are submitted, the vendor must describe the manufacturing differences between the two samples. Optical or scanning electron microscopy may be used to image damage sites. Reflectance measurements may also occur. No other characterization tools will be used on the samples to protect any proprietary features of the samples.

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