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Title: Imprinting high-gradient topographical structures onto optical surfaces using magnetorheological finishing: Manufacturing corrective optical elements for high-power laser applications

Abstract

Corrective optical elements form an important part of high-precision optical systems. We have developed a method to manufacture high-gradient corrective optical elements for high-power laser systems using deterministic magnetorheological finishing (MRF) imprinting technology. Several process factors need to be considered for polishing ultraprecise topographical structures onto optical surfaces using MRF. They include proper selection of MRF removal function and wheel sizes, detailed MRF tool and interferometry alignment, and optimized MRF polishing schedules. Dependable interferometry also is a key factor in high-gradient component manufacture. A wavefront attenuating cell, which enables reliable measurement of gradients beyond what is attainable using conventional interferometry, is discussed. The results of MRF imprinting a 23 μm deep structure containing gradients over 1.6 μm / mm onto a fused-silica window are presented as an example of the technique’s capabilities. As a result, this high-gradient element serves as a thermal correction plate in the high-repetition-rate advanced petawatt laser system currently being built at Lawrence Livermore National Laboratory.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1297660
Alternate Identifier(s):
OSTI ID: 1259200
Report Number(s):
LLNL-JRNL-686928
Journal ID: ISSN 0003-6935; APOPAI
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Applied Optics
Additional Journal Information:
Journal Volume: 55; Journal Issue: 19; Journal ID: ISSN 0003-6935
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 42 ENGINEERING; lasers and laser optics; laser beam shaping; optical design and fabrication; aberration compensation; aberrations; optical fabrication; testing; polishing; dispersion compensation devices

Citation Formats

Menapace, Joseph A., Ehrmann, Paul E., Bayramian, Andrew J., Bullington, Amber, Di Nicola, Jean -Michel G., Haefner, Constantin, Jarboe, Jeffrey, Marshall, Christopher, Schaffers, Kathleen I., and Smith, Cal. Imprinting high-gradient topographical structures onto optical surfaces using magnetorheological finishing: Manufacturing corrective optical elements for high-power laser applications. United States: N. p., 2016. Web. doi:10.1364/AO.55.005240.
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Menapace, Joseph A., Ehrmann, Paul E., Bayramian, Andrew J., Bullington, Amber, Di Nicola, Jean -Michel G., Haefner, Constantin, Jarboe, Jeffrey, Marshall, Christopher, Schaffers, Kathleen I., & Smith, Cal. Imprinting high-gradient topographical structures onto optical surfaces using magnetorheological finishing: Manufacturing corrective optical elements for high-power laser applications. United States. https://doi.org/10.1364/AO.55.005240
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Menapace, Joseph A., Ehrmann, Paul E., Bayramian, Andrew J., Bullington, Amber, Di Nicola, Jean -Michel G., Haefner, Constantin, Jarboe, Jeffrey, Marshall, Christopher, Schaffers, Kathleen I., and Smith, Cal. Tue . "Imprinting high-gradient topographical structures onto optical surfaces using magnetorheological finishing: Manufacturing corrective optical elements for high-power laser applications". United States. https://doi.org/10.1364/AO.55.005240. https://www.osti.gov/servlets/purl/1297660.
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@article{osti_1297660,
title = {Imprinting high-gradient topographical structures onto optical surfaces using magnetorheological finishing: Manufacturing corrective optical elements for high-power laser applications},
author = {Menapace, Joseph A. and Ehrmann, Paul E. and Bayramian, Andrew J. and Bullington, Amber and Di Nicola, Jean -Michel G. and Haefner, Constantin and Jarboe, Jeffrey and Marshall, Christopher and Schaffers, Kathleen I. and Smith, Cal},
abstractNote = {Corrective optical elements form an important part of high-precision optical systems. We have developed a method to manufacture high-gradient corrective optical elements for high-power laser systems using deterministic magnetorheological finishing (MRF) imprinting technology. Several process factors need to be considered for polishing ultraprecise topographical structures onto optical surfaces using MRF. They include proper selection of MRF removal function and wheel sizes, detailed MRF tool and interferometry alignment, and optimized MRF polishing schedules. Dependable interferometry also is a key factor in high-gradient component manufacture. A wavefront attenuating cell, which enables reliable measurement of gradients beyond what is attainable using conventional interferometry, is discussed. The results of MRF imprinting a 23 μm deep structure containing gradients over 1.6 μm / mm onto a fused-silica window are presented as an example of the technique’s capabilities. As a result, this high-gradient element serves as a thermal correction plate in the high-repetition-rate advanced petawatt laser system currently being built at Lawrence Livermore National Laboratory.},
doi = {10.1364/AO.55.005240},
journal = {Applied Optics},
number = 19,
volume = 55,
place = {United States},
year = {Tue Mar 15 00:00:00 EDT 2016},
month = {Tue Mar 15 00:00:00 EDT 2016}
}
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https://doi.org/10.1364/AO.55.005240
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