Coherent optical frequency domain reflectometry for a long single-mode optical fiber using a coherent lightwave source and an external phase modulator

Kohji Tsuji, Kaoru Shimizu, Tsuneo Horiguchi, Yahei Koyamada

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Coherent optical frequency domain reflectometry (C-OFDR) is demonstrated for a long single-mode optical fiber at a wavelength of 1.55 μm by using a highly coherent lightwave source and an electrooptical (EO) external phase modulator. Rayleigh backscattering and Fresnel reflection from a 16.4-km optical fiber are observed when the modulation frequency is swept from 4 GHz to 8 GHz for 40 ms. The insertion of an optical fiber delay line in a probe lightwave path makes it possible to distinguish the Rayleigh backscattering profile due to the first-order modulation sideband in the phase-modulated lightwave from those due to the higher order sidebands. A spatial resolution of better than 100 m is achieved for two neighboring Fresnel reflectors located near the far end of the test fiber.

Original languageEnglish
Pages (from-to)804-806
Number of pages3
JournalIEEE Photonics Technology Letters
Volume7
Issue number7
DOIs
Publication statusPublished - 1995 Jul
Externally publishedYes

Fingerprint

coherent sources
Single mode fibers
Modulators
Optical fibers
modulators
optical fibers
Backscattering
sidebands
Fresnel reflectors
backscattering
sweep frequency
Electric delay lines
Frequency modulation
delay lines
frequency modulation
insertion
spatial resolution
Modulation
modulation
Wavelength

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)
  • Atomic and Molecular Physics, and Optics

Cite this

Coherent optical frequency domain reflectometry for a long single-mode optical fiber using a coherent lightwave source and an external phase modulator. / Tsuji, Kohji; Shimizu, Kaoru; Horiguchi, Tsuneo; Koyamada, Yahei.

In: IEEE Photonics Technology Letters, Vol. 7, No. 7, 07.1995, p. 804-806.

Research output: Contribution to journalArticle

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