野田君（D3）の論文が Applied Physics Express に掲載されました。

フェムト秒レーザを用いてプラスチック光ファイバ中に描画したグレーティングが接触センシングに応用できることを実証した野田君（D3）の論文が、Applied Physics Express に掲載されました。株式会社オキサイドとの共同研究の成果です。

K. Noda, H. Lee, S. Watanabe, K. Nakamura, and Y. Mizuno, “Potential of high-sensitivity tactile sensing using polymer optical fiber gratings,” Appl. Phys. Express, vol. 15, no. 12, 122005 (2022).

We characterize fiber gratings inscribed line-by-line in perfluorinated graded-index polymer optical fibers (PFGI-POFs) for tactile sensing. First, we measure the dependence of the wideband transmitted light spectrum on the distance between the fiber grating and an object composed of metal or rubber, clarifying that the spectral power is significantly dependent on the object position in a wide wavelength range. Subsequently, we experimentally show that this behavior is caused by the light scattering at the fiber grating, indicating that PFGI-POF gratings are potentially applicable to simple low-cost tactile sensors or high-sensitivity short-range displacement sensors with no need for additional supportive tools.