電気スペクトラムアナライザを用いないブリルアン周波数シフトの推定法を提案した捧治紀君（M1）の論文が、Japanese Journal of Applied Physics に掲載されました。
H. Sasage, M. Sakamoto, K. Noda, K. Nakamura, Y. Mizuno, and H. Lee, “Total spectral power-based method for estimating Brillouin frequency shift in optical fibers,” Jpn. J. Appl. Phys., vol. 62, no. 1, 018002 (2023).
A cost-effective method for estimating the Brillouin frequency shift (BFS) of the whole sensing fiber without using an electrical spectrum analyzer is developed. The Brillouin gain spectrum is down-converted and low-pass-filtered, and its total transmitted power is used to estimate the BFS. The strain dynamic range of this method is experimentally shown to be double the value of a conventional slope-assisted method.