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Centroid stabilization for laser alignment to corner cubes: designing a matched filter

Journal Article · · Applied Optics
DOI:https://doi.org/10.1364/AO.56.000A41· OSTI ID:1341987
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
+ Show Author Affiliations
Automation of image-based alignment of NIF high energy laser beams is providing the capability of executing multiple target shots per day. One important alignment is beam centration through the second and third harmonic generating crystals in the final optics assembly (FOA), which employs two retro-reflecting corner cubes as centering references for each beam. Beam-to-beam variations and systematic beam changes over time in the FOA corner cube images can lead to a reduction in accuracy as well as increased convergence durations for the template-based position detector. A systematic approach is described that maintains FOA corner cube templates and guarantees stable position estimation.
Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1341987
Alternate ID(s):
OSTI ID: 1330975
OSTI ID: 1342049
Report Number(s):
LLNL-JRNL--704797
Journal Information:
Applied Optics, Journal Name: Applied Optics Journal Issue: 1 Vol. 56; ISSN APOPAI; ISSN 0003-6935
Publisher:
Optical Society of America (OSA)Copyright Statement
Country of Publication:
United States
Language:
English

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