Novel in-service measurement technique using the same wavelength band as SCM signals

Fumihiko Yamamoto, Tsuneo Horiguchi

Research output: Contribution to journalArticle

4 Citations (Scopus)


This paper proposes a new technique for measuring in-service optical fibers, that uses an optical time domain reflectometer (OTDR). The feature of the proposed technique is that the OTDR light is in the same wavelength band as the video signal, which is distributed by using the subcarrier multiplexing (SCM) technique. In a 40-channel SCM system operating at a signal wavelength of 1.558 μm, we show that the required video quality can be maintained, by using the proposed OTDR operating in the 1.55 μm band, even though the measured fiber is in service and the OTDR light enters an optical receiver. Moreover, we clarify the conditions for undertaking measurements, without the need for optical filters designed to prevent OTDR light from degrading the SCM signal quality.

Original languageEnglish
Pages (from-to)1381-1388
Number of pages8
JournalJournal of Lightwave Technology
Issue number10
Publication statusPublished - 2000 Oct
Externally publishedYes


ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

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