Brillouin optical-fiber time domain reflectometry

Toshio Kurashima, Tsuneo Horiguchi, Hisashi Izumita, Shin ichi Furukawa, Yahei Koyamada

Research output: Contribution to journalArticlepeer-review

362 Citations (Scopus)


We report on Brillouin optical-fiber time domain reflectometry (BOTDR) for distributed temperature or strain measurement along a single-mode optical fiber. BOTDR uses Brillouin scattering in optical fibers, whose Brillouin frequency shift increases in proportion to temperature or strain induced in the fiber. This method requires access to only one end of a fiber, as with conventional optical time domain reflectometry (OTDR) which uses Rayleigh scattering in optical fibers. In BOTDR, a coherent optical detection method is used as a backscattered light detection technique. This technique can achieve both high sensitivity and high frequency resolution and easily separate a weak Brillouin line from a strong Rayleigh scattering peak and Fresnel reflected light. Experimental results show the potential for measuring temperature and strain distribution with respective accuracies of ±3 °C or ±0.006%, and a spatial resolution of 100 m in an 11.57 km long fiber.

Original languageEnglish
Pages (from-to)382-390
Number of pages9
JournalIEICE Transactions on Communications
Issue number4
Publication statusPublished - 1993 Apr
Externally publishedYes

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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