王さん（元研究員）・岸澤君（OB）の論文が Applied Physics Express に掲載されました。

多モード光ファイバ・ブラッグ・グレーティングからの反射スペクトルの温度依存パワー変動の抑制法に関する王さん（元研究員）と岸澤君（OB）の論文が、Applied Physics Express に掲載されました。

K. Wang, K. Kishizawa, K. Noda, W. Kurz, X. Dong, A. W. Koch, H. Lee, K. Nakamura, and Y. Mizuno, “Spectral power stabilization against temperature variations in multimode fiber Bragg gratings,” Appl. Phys. Express, vol. 17, no. 5, 052001 (2024).

Fiber Bragg gratings (FBGs) have been extensively used for single-point and multi-point measurements, mostly inscribed in single-mode fibers (SMFs). However, it is feasible to inscribe FBGs in multimode fibers (MMFs), which are resistant to bending and can perform discriminative sensing of multiple physical parameters. When using a simple experimental setup to measure the temperature dependence of the dip in the transmission spectrum, significant fluctuations in its spectral power can be observed. Therefore, in this study, we show that the temperature-dependent spectral power fluctuations in multimode FBGs can be mitigated by the use of a reflectometric configuration with suppressed modal interference, leading to higher-reliability temperature sensing.