Performance improvement of a combined OTDR for distributed strain and loss measurement by randomizing the reference light polarization state

T. Kurashima, M. Tateda, T. Horiguchi, Y. Koyamada

Research output: Contribution to journalArticle

56 Citations (Scopus)


We successfully improve the ability of an OTDR, which combines both BOTDR and COTDR functions, to measure strain and optical loss distribution along optical fibers, by randomizing the polarization state of the reference lightwave for optical coherent detection. The OTDR is upgraded to provide a high-spatial resolution of up to 1 m in the BOTDR mode and a fading noise as low as 0.05 dB in the COTDR mode.

Original languageEnglish
Pages (from-to)360-362
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number3
Publication statusPublished - 1997 Mar 1



  • Brillouin scattering
  • Optical fiber measurement
  • Optical fibers
  • Strain measurement

ASJC Scopus subject areas

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

Cite this