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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 22 — Aug. 1, 2011
  • pp: 4478–4488

High-resolution random-modulation cw lidar

Xiao Ai, Richard Nock, John G. Rarity, and Naim Dahnoun  »View Author Affiliations

Applied Optics, Vol. 50, Issue 22, pp. 4478-4488 (2011)

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A high-resolution random-modulation continuous wave lidar for surface detection using a semiconductor laser diode is presented. The laser diode is intensity modulated with the pseudorandom binary sequence. Its enhanced resolution is achieved via interpolation and a novel front-end analog technique, lowering the requirement of the analog-to-digital converter sampling rate and the associated circuitry. Its mathematical model is presented, including the derivation of the signal-to-noise ratio and the distance standard deviation. Analytical and experimental results demonstrate its capability to achieve distance accuracy of less than 2 cm within 2.6 ms acquisition time, over distances ranging from 1 to 12 m . The laser diode emits 1.4 mW of optical power at a wavelength of 635 nm .

© 2011 Optical Society of America

OCIS Codes
(070.4550) Fourier optics and signal processing : Correlators
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(280.3400) Remote sensing and sensors : Laser range finder
(280.3640) Remote sensing and sensors : Lidar

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: February 17, 2011
Revised Manuscript: June 9, 2011
Manuscript Accepted: June 11, 2011
Published: July 28, 2011

Xiao Ai, Richard Nock, John G. Rarity, and Naim Dahnoun, "High-resolution random-modulation cw lidar," Appl. Opt. 50, 4478-4488 (2011)

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