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Proceedings Paper

Broadband laser ranging: signal analysis and interpretation
Author(s): Natalie Kostinski; Michelle A. Rhodes; Jared Catenacci; Marylesa Howard; Brandon M. La Lone; Patrick Younk; Adam Lodes; Corey V. Bennett; Patrick J. Harding
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Paper Abstract

Broadband laser ranging (BLR) is essentially a spectral interferometer used to infer distance to a moving target. The light source is a mode-locked fiber laser, and chromatic dispersion maps the spectral interference pattern into the time domain, yielding chirped beat signals at the detector. A BLR record is a sequence of these chirped signals, representing consecutive target positions. To infer distance to a target, each underlying pulse envelope must be consistently registered and subtracted despite environmentally-induced variability. Then, nonlinear transformation of the phase is applied to remove the chirp, an FFT is performed to determine the peak frequency of the de-chirped signal, and a calibration factor relating de-chirped frequency to distance results in target position. Here, these analysis steps are discussed in detail.

Paper Details

Date Published: 22 February 2017
PDF: 11 pages
Proc. SPIE 10089, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications II, 100890G (22 February 2017); doi: 10.1117/12.2255679
Show Author Affiliations
Natalie Kostinski, Lawrence Livermore National Lab. (United States)
Michelle A. Rhodes, Lawrence Livermore National Lab. (United States)
Jared Catenacci, National Security Technologies, LLC (United States)
Marylesa Howard, National Security Technologies, LLC (United States)
Brandon M. La Lone, National Security Technologies, LLC (United States)
Patrick Younk, Los Alamos National Lab. (United States)
Adam Lodes, Lawrence Livermore National Lab. (United States)
Corey V. Bennett, Lawrence Livermore National Lab. (United States)
Patrick J. Harding, Los Alamos National Lab. (United States)


Published in SPIE Proceedings Vol. 10089:
Real-time Measurements, Rogue Phenomena, and Single-Shot Applications II
Bahram Jalali; Daniel R. Solli; Sergei K. Turitsyn; Günter Steinmeyer; Neil G. R. Broderick, Editor(s)

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