Journal
OPTICS LETTERS
Volume 45, Issue 9, Pages 2636-2639Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.390425
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Funding
- National Defense Science and Engineering Graduate
- National Science Foundation [DGE 1650115, DMR 1553905, ECCS 1509733, ECCS 1509928, ECCS 1554704]
- Air Force Office of Scientific Research [FA9550-17-1-0224]
- University of Colorado Boulder (SeedGrant Program) Department of Electrical, Computer, and Energy Engineering atUniversity of Colorado Boulder
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There are two established methods for measuring rotational Doppler shift: (1) heterodyne and (2) fringe. We identify a key distinction, that only the heterodyne method is sensitive to the rotating object's phase, which results in significant differences in the signal-to-noise ratio (SNR) when measuring multiple rotating particles. When used to measure randomly distributed rotating particles, the fringe method produces its strongest SNR when a single particle is present and its SNR tends to zero as the number of particles increases, whereas the heterodyne method's SNR increases proportionally to the number of particles in the beam. (C) 2020 Optical Society of America
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