skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

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 [1];  [2];  [2];  [2];  [2];  [2];  [2]
  1. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). NIF & Photon Sciences, Advanced Photon Technologies Program
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; 945775
Grant/Contract Number:  
AC52-07NA27344; 17-ERD-033
Resource Type:
Published Article
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 27; Journal Issue: 19; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
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., 2018. 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. Thu . "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},
number = 19,
volume = 27,
place = {United States},
year = {2018},
month = {9}
}

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

Save / Share: