Water penetration sensing using wavelength tunable OTDR

Mitsuhiro Tateda, Tsuneo Horiguchi

Research output: Contribution to journalArticle

4 Citations (Scopus)


A method for sensing water penetration into optical cable using a wavelength tunable optical time domain reflectometer (OTDR) is proposed. The reflectivity at every Fabry-Perot connector gap contained in a monitoring fiber has periodic wavelength dependence. It is shown 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)1-3
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number1
Publication statusPublished - 1991 Jan
Externally publishedYes


ASJC Scopus subject areas

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

Cite this