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Title: Entirely reflective slit spatial filter for high-energy laser systems

Abstract

An entirely reflective slit spatial filter is proposed to provide spatial filtering, gain isolation, and ASE mitigation for high-energy laser systems. The traditional circular pinhole is replaced by two orthogonal slits, which lowers the intensity at the spatial filter plane by up to two orders of magnitude, and by using reflective optics we reduce spatial dispersion and eliminate B-integral effects. A ray trace model of the spatial filter shows excellent transmitted wavefront, but also indicates aberrations at the foci from using cylindrical optics at 45°. It is expected that the use of off-axis parabolic mirrors would mitigate this issue but comes at the cost of more complicated, expensive optics and more complex alignment. We created a numerical model based on Fourier optics to explain this effect and guide design requirements to mitigate it. High-quality imaging and filtering capabilities are demonstrated experimentally.

Authors:
ORCiD logo; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1565970
Alternate Identifier(s):
OSTI ID: 1568004
Report Number(s):
LLNL-JRNL-758559
Journal ID: ISSN 1094-4087; OPEXFF
Grant/Contract Number:  
17-ERD-033; AC52-07NA27344
Resource Type:
Journal Article: Published Article
Journal Name:
Optics Express
Additional Journal Information:
Journal Name: Optics Express Journal Volume: 27 Journal Issue: 19; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; Lasers

Citation Formats

Chesnut, K., Bayramian, A., Erlandson, A., Galvin, T., Sistrunk, E., Spinka, T., and Haefner, C. Entirely reflective slit spatial filter for high-energy laser systems. United States: N. p., 2019. Web. doi:10.1364/OE.27.027017.
Chesnut, K., Bayramian, A., Erlandson, A., Galvin, T., Sistrunk, E., Spinka, T., & Haefner, C. Entirely reflective slit spatial filter for high-energy laser systems. United States. doi:10.1364/OE.27.027017.
Chesnut, K., Bayramian, A., Erlandson, A., Galvin, T., Sistrunk, E., Spinka, T., and Haefner, C. Wed . "Entirely reflective slit spatial filter for high-energy laser systems". United States. doi:10.1364/OE.27.027017.
@article{osti_1565970,
title = {Entirely reflective slit spatial filter for high-energy laser systems},
author = {Chesnut, K. and Bayramian, A. and Erlandson, A. and Galvin, T. and Sistrunk, E. and Spinka, T. and Haefner, C.},
abstractNote = {An entirely reflective slit spatial filter is proposed to provide spatial filtering, gain isolation, and ASE mitigation for high-energy laser systems. The traditional circular pinhole is replaced by two orthogonal slits, which lowers the intensity at the spatial filter plane by up to two orders of magnitude, and by using reflective optics we reduce spatial dispersion and eliminate B-integral effects. A ray trace model of the spatial filter shows excellent transmitted wavefront, but also indicates aberrations at the foci from using cylindrical optics at 45°. It is expected that the use of off-axis parabolic mirrors would mitigate this issue but comes at the cost of more complicated, expensive optics and more complex alignment. We created a numerical model based on Fourier optics to explain this effect and guide design requirements to mitigate it. High-quality imaging and filtering capabilities are demonstrated experimentally.},
doi = {10.1364/OE.27.027017},
journal = {Optics Express},
issn = {1094-4087},
number = 19,
volume = 27,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1364/OE.27.027017

Figures / Tables:

Fig. 1 Fig. 1: Diagram of the cylindrical lens spatial filter patented by Erlandson.

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Works referenced in this record:

Suppression of self-focusing through low-pass spatial filtering and relay imaging
journal, January 1978

  • Hunt, J. T.; Glaze, J. A.; Simmons, W. W.
  • Applied Optics, Vol. 17, Issue 13
  • DOI: 10.1364/AO.17.002053

Spatial filter pinhole for high-energy pulsed lasers
journal, January 1998

  • Celliers, Peter M.; Estabrook, Kent G.; Wallace, Russell J.
  • Applied Optics, Vol. 37, Issue 12
  • DOI: 10.1364/AO.37.002371

Filtering characteristics of a three-lens slit spatial filter for high-power lasers
journal, January 2017


Ghost reflection analysis for the main laser of the National Ignition Facility
conference, September 1998

  • English, Jr., R. Edward; Miller, John L.; Schweyen, John C.
  • International Optical Design Conference, SPIE Proceedings
  • DOI: 10.1117/12.321973

High-damage-threshold pinhole for glass fusion laser applications
conference, July 1999

  • Kurnit, Norman A.; Letzring, S. A.; Johnson, Randall P.
  • Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, SPIE Proceedings
  • DOI: 10.1117/12.354211

Pinhole closure in spatial filters of large-scale ICF laser systems
conference, July 1999

  • Bikmatov, R. G.; Boley, Charles D.; Burdonsky, I. N.
  • Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, SPIE Proceedings
  • DOI: 10.1117/12.354165

Closure of pinholes under intense laser radiation
journal, January 1977


Advanced Mitigation Process (AMP) for Improving Laser Damage Threshold of Fused Silica Optics
journal, August 2016

  • Ye, Xin; Huang, Jin; Liu, Hongjie
  • Scientific Reports, Vol. 6, Issue 1
  • DOI: 10.1038/srep31111

High average power, diode pumped petawatt laser systems: a new generation of lasers enabling precision science and commercial applications
conference, June 2017

  • Haefner, C. L.; Bayramian, A.; Betts, S.
  • SPIE Optics + Optoelectronics, SPIE Proceedings
  • DOI: 10.1117/12.2281050

Characteristics and performance of a two-lens slit spatial filter for high power lasers
journal, May 2017


Compact, Efficient Laser Systems Required for Laser Inertial Fusion Energy
journal, July 2011

  • Bayramian, A.; Aceves, S.; Anklam, T.
  • Fusion Science and Technology, Vol. 60, Issue 1
  • DOI: 10.13182/FST10-313

Propagation of a high‐intensity laser pulse with small‐scale intensity modulation
journal, October 1974

  • Bliss, E. S.; Speck, D. R.; Holzrichter, J. F.
  • Applied Physics Letters, Vol. 25, Issue 8
  • DOI: 10.1063/1.1655543

Effect of halo on the stability of electron bunches in laser wakefield acceleration
journal, February 2016


Performance of a simplified slit spatial filter for large laser systems
journal, January 2014


    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.