Temperature dependence of Brillouin frequency shift in polymers controlled by plasticization effect

Kazunari Minakawa, Kotaro Koike, Qiming Du, Neisei Hayashi, Yasuhiro Koike, Yosuke Mizuno, Kentaro Nakamura

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4 Citations (Scopus)


The temperature-dependence coefficient of Brillouin frequency shift (BFS) in perfluorinated graded-index polymer optical fibers is known to change drastically, because of the glass transition, at a certain critical temperature (Tc), above which the BFS becomes more sensitive to temperature. In this paper, we demonstrate that the Tc value can be adjusted by varying the dopant concentration, which is originally used to form the graded-index profile in the core region. Furthermore, we show that the temperature sensitivity of the BFS is enhanced in the presence of dopant probably because the temperature sensitivity of Young's modulus is increased. The results indicate a big potential of the temperature sensors based on Brillouin scattering with an extremely high sensitivity in a specific desired temperature range.

Original languageEnglish
Article number144505
JournalJournal of Applied Physics
Issue number14
Publication statusPublished - 2015 Apr 14


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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