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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 10 — Apr. 1, 1998
  • pp: 1731–1734

Optical time-domain reflectometry in optical fiber with reflection delay time matched to the period of the optical frequency modulation

Mark Froggatt and Willie Bowen  »View Author Affiliations


Applied Optics, Vol. 37, Issue 10, pp. 1731-1734 (1998)
http://dx.doi.org/10.1364/AO.37.001731


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Abstract

A method of optical time-domain reflectrometry in optical fiber is described that uses a single distributed feedback diode laser and a reference reflector. When the period of the frequency modulation of the laser matches the time difference between the reference reflection and the reflection of interest an increase in the noise at the detector occurs. The locations of reflections within the fiber are then mapped to frequencies at which the noise at the detector increases. A sinusoidal frequency modulation is analyzed, and an experiment is described in which the system is used to measure the location and the wavelength of two Bragg gratings located 10 cm apart in an optical fiber. Wavelength measurement is accomplished by temperature tuning the diode laser.

© 1998 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.2400) Fiber optics and optical communications : Fiber properties
(060.2630) Fiber optics and optical communications : Frequency modulation

History
Original Manuscript: June 11, 1997
Revised Manuscript: November 14, 1997
Published: April 1, 1998

Citation
Mark Froggatt and Willie Bowen, "Optical time-domain reflectometry in optical fiber with reflection delay time matched to the period of the optical frequency modulation," Appl. Opt. 37, 1731-1734 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-10-1731


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References

  1. D. Strickland, G. Mourou, “Compression of amplified chirped optical pulses,” Opt. Commun. 56, 219–221 (1985). [CrossRef]
  2. D. E. Vakman, ed., Sophisticated Signals and the Uncertainty Principle in Radar (Springer-Verlag, New York, 1968). [CrossRef]
  3. T. H. Bosselmann, R. Urlich, “High-accuracy position sensing with fiber-coupled white-light interferometers,” in Second International Conference on Optical Fiber Sensors, R. T. Kersten, R. Kist, eds., Proc. SPIE514, 361–364 (1984).
  4. W. B. Spillman, P. L. Fuhr, B. L. Anderson, “Performance of integrated source/detector combinations for smart skins incoherent optical frequency domain reflectometry (IOFDR) distributed fiber optic sensors,” in Fiber Optic Smart Structures and Skins, E. Udd, ed., Proc. SPIE986, 106–118 (1988). [CrossRef]

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