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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 24 — Aug. 20, 2002
  • pp: 5096–5104

Implementing torsional-mode Doppler ladar

David U. Fluckiger  »View Author Affiliations


Applied Optics, Vol. 41, Issue 24, pp. 5096-5104 (2002)
http://dx.doi.org/10.1364/AO.41.005096


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Abstract

Laguerre–Gaussian laser modes carry orbital angular momentum as a consequence of their helical-phase front screw dislocation. This torsional beam structure interacts with rotating targets, changing the orbital angular momentum (azimuthal Doppler) of the scattered beam because angular momentum is a conserved quantity. I show how to measure this change independently from the usual longitudinal momentum (normal Doppler shift) and derive the apropos coherent mixing efficiencies for monostatic, truncated Laguerre and Gaussian-mode ladar antenna patterns.

© 2002 Optical Society of America

OCIS Codes
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.7250) Instrumentation, measurement, and metrology : Velocimetry
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.3340) Remote sensing and sensors : Laser Doppler velocimetry
(280.3640) Remote sensing and sensors : Lidar

History
Original Manuscript: February 1, 2002
Revised Manuscript: May 20, 2002
Published: August 20, 2002

Citation
David U. Fluckiger, "Implementing torsional-mode Doppler ladar," Appl. Opt. 41, 5096-5104 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-24-5096

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