Measurement of Rayleigh Backscattering in Single-Mode Fibers Based on Coherent OFDR Employing a DFB Laser Diode

Kaoru Shimizu, Tsuneo Horiguchi, Yahei Koyamada

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Rayleigh backscattering in a single-mode optical fiber is measured by coherent-OFDR employing a frequency variable DFB laser diode. Backscattered power from the neighborhood of the far end of a 0.5 km long fiber is measured with a spatial resolution of 50 cm. The insertion of a delay line fiber in the reference optical path and an acoustooptic frequency shifter in the signal optical path enable us to measure backscattering in a long optical fiber in spite of the short coherence length of the DFB-LD.

Original languageEnglish
Pages (from-to)1039-1041
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number11
Publication statusPublished - 1991 Nov


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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