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

Kaoru Shimizu; Tsuneo Horiguchi; Yahei Koyamada

doi:10.1109/68.97855

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

Kaoru Shimizu, Tsuneo Horiguchi, Yahei Koyamada

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	1039-1041
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	3
Issue number	11
DOIs	https://doi.org/10.1109/68.97855
Publication status	Published - 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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AB - 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.

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

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