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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 35, Iss. 22 — Aug. 1, 1996
  • pp: 4349–4354

Single-beam diode-laser technique for optical path-length measurements

Clinton B. Carlisle, Russell E. Warren, and Haris Riris  »View Author Affiliations


Applied Optics, Vol. 35, Issue 22, pp. 4349-4354 (1996)
http://dx.doi.org/10.1364/AO.35.004349


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Abstract

A simple single-beam technique employing radio-frequency modulation of a tunable diode laser with homodyne demodulation is demonstrated as a means of measuring optical path lengths. This technique offers a straightforward method for determining path lengths traversed through optical multipass cells or performing optical range-finding over short (i.e., tens of meters) standoff distances. The radio-frequency phase-sensitive nature of the technique permits narrow-band detection and high signal-to-noise ratios, even when range-finding measurements are made with range resolutions of ≪1 m. This compares favorably with traditional short-pulse, wide-bandwidth optical range finders.

© 1996 Optical Society of America

History
Original Manuscript: September 7, 1995
Revised Manuscript: February 22, 1996
Published: August 1, 1996

Citation
Clinton B. Carlisle, Russell E. Warren, and Haris Riris, "Single-beam diode-laser technique for optical path-length measurements," Appl. Opt. 35, 4349-4354 (1996)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-35-22-4349

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