王さん（客員研究員）の論文が Japanese Journal of Applied Physics に掲載されました。

四角コア光ファイバ中のモード間干渉を用いて、歪に依存しない高感度な温度センシングを実現した王さん（客員研究員）の論文が、Japanese Journal of Applied Physics に掲載されました。

K. Wang, Y. Mizuno, X. Dong, W. Kurz, F. Maximilian, M. Jakobi, and A. W. Koch, “Strain-insensitive high-sensitivity temperature sensing based on multimode interference in a square-core fiber,” Jpn. J. Appl. Phys., vol. 61, no. 7, 078002 (2022).

A strain-insensitive high-sensitivity temperature sensor based on multimode interference in a specialty fiber with a square core is developed and experimentally investigated. A 25-cm-long square-core fiber is used as a multimode fiber (MMF) of a single-mode–multimode–single-mode structure and the temperature dependence of its transmitted spectrum is measured while the strain is applied continually from 0 to 500 µε with steps of 100 µε. The mean temperature sensitivity is -22.35 pm/^oC, which is ∼3.5 times higher than that of a standard MMF, and it is almost independent of strain with a small standard deviation of 0.44 pm/^oC.