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Title: Ultra-high-bandwidth polarization interferometry and optimal quadratic phase detection

Abstract

A novel homodyne interferometer and analysis method are described which use orthogonal polarization components to measure large rapid changes in interferometric phase, in quadrature, in the presence of strong time-dependent attenuation of the scene beam. Here, this approach overcomes the major sources of error associated with homodyne interferometry (sensitivity nulls, ambiguity in the direction of phase change when passing through a sensitivity null, and intolerance to beam power variations) while maintaining its intrinsic simplicity and speed, enabling extremely high-bandwidth, high-dynamic range measurements limited only by available detector technology. Using this technique, electron density in a magnetized plasma shock was measured with unprecedented bandwidth and resolution, revealing short-timescale features not previously observed.

Authors:
ORCiD logo [1]; ORCiD logo [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. TAE Tecnnologies, Inc., Foothill Ranch, CA (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1570614
Report Number(s):
LA-UR-17-29521
Journal ID: ISSN 0034-6748
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 90; Journal Issue: 8; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Weber, Thomas E., and Smith, Roger J. Ultra-high-bandwidth polarization interferometry and optimal quadratic phase detection. United States: N. p., 2019. Web. doi:10.1063/1.5091569.
Weber, Thomas E., & Smith, Roger J. Ultra-high-bandwidth polarization interferometry and optimal quadratic phase detection. United States. doi:10.1063/1.5091569.
Weber, Thomas E., and Smith, Roger J. Tue . "Ultra-high-bandwidth polarization interferometry and optimal quadratic phase detection". United States. doi:10.1063/1.5091569.
@article{osti_1570614,
title = {Ultra-high-bandwidth polarization interferometry and optimal quadratic phase detection},
author = {Weber, Thomas E. and Smith, Roger J.},
abstractNote = {A novel homodyne interferometer and analysis method are described which use orthogonal polarization components to measure large rapid changes in interferometric phase, in quadrature, in the presence of strong time-dependent attenuation of the scene beam. Here, this approach overcomes the major sources of error associated with homodyne interferometry (sensitivity nulls, ambiguity in the direction of phase change when passing through a sensitivity null, and intolerance to beam power variations) while maintaining its intrinsic simplicity and speed, enabling extremely high-bandwidth, high-dynamic range measurements limited only by available detector technology. Using this technique, electron density in a magnetized plasma shock was measured with unprecedented bandwidth and resolution, revealing short-timescale features not previously observed.},
doi = {10.1063/1.5091569},
journal = {Review of Scientific Instruments},
number = 8,
volume = 90,
place = {United States},
year = {2019},
month = {8}
}

Journal Article:
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Works referenced in this record:

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