Water Penetration Sensing Using Wavelength Tunable otdr

Mitsuhiro Tateda, Tsuneo Horiguchi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


A new method for sensing water penetration into optical cable using a wavelength tunable OTDR is proposed. The reflectivity at every Fabry-Perot connector gap contained in a monitoring fiber has periodic wavelength dependence. It is confirmed experimentally that water penetration into a connector gap results in a wavelength period change, the ratio of which coincides with the refractive index of water regardless of the size of the gap.

Original languageEnglish
Pages (from-to)844-846
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number11
Publication statusPublished - 1990 Nov
Externally publishedYes

ASJC Scopus subject areas

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


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