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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 11 — Apr. 10, 2013
  • pp: 2447–2453

Improvement of range accuracy of photon counting chirped AM ladar using phase postprocessing

Zijing Zhang, Yuan Zhao, Yong Zhang, Long Wu, and Jianzhong Su  »View Author Affiliations


Applied Optics, Vol. 52, Issue 11, pp. 2447-2453 (2013)
http://dx.doi.org/10.1364/AO.52.002447


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Abstract

The photon counting detection of Geiger mode avalanche photodiode is discrete due to its dead time, therefore the intermediate frequency (IF) spectrum is also discrete after the mixing and fast Fourier transform processing. When the peak of the IF spectrum is in the interval of the discrete IF spectrum, it limits the range accuracy without obtaining the exact position of the desired target in the interval. In this paper, the phase postprocessing method is proposed, which extracts not only the frequency of the IF signal, but also the phase of the IF signal that was not exploited before. The theoretical analysis demonstrates significant improvements in the range accuracy of the ladar and the simulation verifies the validity of the method.

© 2013 Optical Society of America

OCIS Codes
(030.5260) Coherence and statistical optics : Photon counting
(280.3400) Remote sensing and sensors : Laser range finder
(320.1590) Ultrafast optics : Chirping
(040.1345) Detectors : Avalanche photodiodes (APDs)

ToC Category:
Detectors

History
Original Manuscript: January 23, 2013
Manuscript Accepted: February 27, 2013
Published: April 10, 2013

Citation
Zijing Zhang, Yuan Zhao, Yong Zhang, Long Wu, and Jianzhong Su, "Improvement of range accuracy of photon counting chirped AM ladar using phase postprocessing," Appl. Opt. 52, 2447-2453 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-11-2447


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References

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