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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 25 — Dec. 7, 2009
  • pp: 22925–22936

Optical time-of-flight measurement based on data transmission in a ring oscillator

Reinhold Noé, Benjamin Koch, and David Sandel  »View Author Affiliations


Optics Express, Vol. 17, Issue 25, pp. 22925-22936 (2009)
http://dx.doi.org/10.1364/OE.17.022925


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Abstract

We introduce a novel optical propagation delay measurement scheme for distance estimation. It is based on a ring oscillator in which the oscillation signal is replaced by the clock information contained in optical data. A clock-and-data recovery can recover the oscillation signal at the receive end. Correlation of the received pattern with the transmitted pattern and a measurement of the bit duration by a frequency counter allow to determine the distance. The scheme has been realized at 1550 nm wavelength, using an externally modulated laser, a commercial 155.52 Mb/s clock-and-data recovery and a field-programmable gate array. Short-term repeatability is <10 µm at an equivalent free-space distance of 72 m. Measurement interval is 0.1 s. At 3 km distance the relative repeatability is 8·10−8. The readout can be corrected with measured temperature data.

© 2009 OSA

OCIS Codes
(060.4510) Fiber optics and optical communications : Optical communications
(120.3940) Instrumentation, measurement, and metrology : Metrology

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: October 12, 2009
Revised Manuscript: November 25, 2009
Manuscript Accepted: November 25, 2009
Published: December 1, 2009

Citation
Reinhold Noé, Benjamin Koch, and David Sandel, "Optical time-of-flight measurement based on data transmission in a ring oscillator," Opt. Express 17, 22925-22936 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-25-22925


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References

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