Coherent Self-Heterodyne Brillouin OTDR for Measurement of Brillouin Frequency Shift Distribution in Optical Fibers

Kaoru Shimizu, Tsuneo Horiguchi, Yahei Koyamada, Toshio Kurashima

Research output: Contribution to journalArticle

124 Citations (Scopus)


Time domain reflectometry of spontaneously Brillouin scattered lightwaves in a single-mode optical fiber is demonstrated with a coherent self-heterodyne detection system employing a recently proposed frequency translator, a DFB laser diode, and erbium-doped fiber amplifiers. Since the probe pulse frequency is up-converted by the translator by an amount approximately equal to the Brillouin frequency shift, the self-heterodyne beat frequency can be reduced to a sufficiently low frequency in the IF band. The system enables one-end measurement of the Brillouin frequency shift distribution in optical fibers with a single way dynamic range (SWDR) of 16 dB and a frequency resolution of 5 MHz for a spatial resolution of 100 m.

Original languageEnglish
Pages (from-to)730-736
Number of pages7
JournalJournal of Lightwave Technology
Issue number5
Publication statusPublished - 1994 May


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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