立命館大学ほかとの共同研究の成果が Japanese Journal of Applied Physics に掲載されました。

反応性イオンエッチングで異方的に削ったプラスチック光ファイバ中のモード間干渉を用いた高感度歪センシングを実証した論文が、Japanese Journal of Applied Physics に掲載されました。立命館大学・東京工業大学・芝浦工業大学・国立清華大学との共同研究の成果です。

T. Nakanishi, A. Kato, Y. Wada, R. Nakashima, C. Zhao, C. Y. Lo, K. Nakamura, H. Lee, Y. Mizuno, and D. Yamane, “Multimode interference-based strain sensing using micro dry-etched perfluorinated polymer optical fibers,” Jpn. J. Appl. Phys., vol. 63, no. 2, 028003 (2024).

This study explores the impact of a micro dry-etching technique on strain sensing based on multimode interference in a perfluorinated polymer optical fiber (POF). We demonstrate a drastic shift in strain sensitivity, from +34 nm/% in a non-etched POF to -981 nm/% in the etched POF. This notable change may be attributed to the excitation of the axially asymmetrical modes in the etched POF, which is confirmed through simulation on the stress distribution across the core. In addition, a critical wavelength for multimode interference is observed in a POF.