自己ヘテロダイン検波によるブリルアン観測系の遅延線の長さの最適化に関する坂本真菜さん（OG）の研究成果が Electronics Letters に掲載されました。
M. Sakamoto, H. Sasage, K. Nakamura, Y. Mizuno, and H. Lee, “Influence of reference path length on self-heterodyne-based Brillouin observation,” Electron. Lett., vol. 59, no. 13, e12856 (2023).
Fibre-optic distributed Brillouin sensing that utilises correlation-domain techniques often requires an optical delay fibre in the reference path to control the correlation peak order in the sensing fibre. Nonetheless, a suboptimal delay fibre length can result in decreased performance. In this work, as a first step towards clarifying the optimal delay fibre length for Brillouin correlation-domain sensing, we evaluate the effect of changing the delay fibre length on the Brillouin gain spectra in a full-length measurement scenario.