Detection technique effect on rotational Doppler measurements
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 30, 2020
- Source ID
- 10.1364/ol.390425
Entities
People
- Alexander Q Anderson
- Brendan M. Heffernan
- Elizabeth F Strong
- Gregory B Rieker
- Juliet T. Gopinath
- Mark Siemens
Organizations
- Air Force Office of Scientific Research
- National Science Foundation
- University of Colorado Boulder