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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 29, Iss. 31 — Nov. 1, 1990
  • pp: 4578–4582

Frequency domain optical reflectometer using a GaAs optoelectronic mixer

R. Ian MacDonald and Brent E. Swekla  »View Author Affiliations


Applied Optics, Vol. 29, Issue 31, pp. 4578-4582 (1990)
http://dx.doi.org/10.1364/AO.29.004578


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Abstract

A frequency domain optical reflectometer which uses a GaAs interdigital photodetector both for optical detection and for mixing is described. A simple receiver with a postdetection bandwidth of the order of 10 kHz suffices for distance resolution of 10 m with this technique, greatly simplifying the electronics by comparison with pulsed reflectometers or swept frequency reflectometers employing electronic mixing. With available lasers the instrument could detect discrete optical reflections of −57 dB at a distance of 1 km. It is intended for remote measurement of refractive index in fluids, using the Fresnel reflection from a square-cleaved fiber as the sensor.

© 1990 Optical Society of America

History
Original Manuscript: September 18, 1989
Published: November 1, 1990

Citation
R. Ian MacDonald and Brent E. Swekla, "Frequency domain optical reflectometer using a GaAs optoelectronic mixer," Appl. Opt. 29, 4578-4582 (1990)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-29-31-4578

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