Coherent OFDR for the Measurement of Backscattered Lightwave from Long Optical Fibers

10 References

Bibliographic Information

Other Title
  • コヒーレントOFDRによる長尺光ファイバの後方散乱光強度分布測定

Search this article

Description

We describe coherent optical frequency domain reflectometry (C-OFDR) which uses the beat signal resulting from the mixing of phase-decorrelated lightwaves. This is suitable for the measurement of long optical fibers, because the measurable distance is not limited by the coherence length of the lightwave. In this paper, we describe its performances such as a spatial resolution and a single-way-dynamic range (SWDR). We demonstrated the measurement using a 1.55-μm narrow-linewidth-lightwave source and an external electro-optical-phase modulator. Rayleigh backscattering and Fresnel reflections from 30-km optical fiber were observed. The spectral broadening due to the nonlinearity in the frequency sweep was reduced. As a result, a spatial resolution of 5 m was achieved for the two neighboring Fresnel reflectors located at the far end of the test fiber.

Journal

References(10)*help

See more

Keywords

Details 詳細情報について

  • CRID
    1570572702455286912
  • NII Article ID
    110003282442
  • NII Book ID
    AN10013298
  • Text Lang
    ja
  • Data Source
    • CiNii Articles

Report a problem

Back to top