高橋君（D2）の論文が Optics Express に掲載されました。

ブリルアン光時間領域解析法を用いた損失分布計測技術の性能を向上させた高橋君（D2）の論文が、Optics Express に掲載されました。

H. Takahashi, Y. Mizuno, and Y. Koshikiya, “Brillouin-based fiber loss measurement for PON using ERA-BOTDA with differential width pairs of frequency-swept pump pulses,” Opt. Express, vol. 32, no. 15, pp. 26232-26244 (2024).

We demonstrate Brillouin-based loss distribution measurement for passive optical networks with differential width pairs of frequency-swept pump pulses that can suppress the spatial resolution degradation, especially those created by large loss events typical of an 8-branch splitter. Based on the acoustic wave simulation of a frequency-swept pump pulse, we investigate the arrangement of the modulation frequency within the optical pulse. A preliminary experiment is conducted on a 5-dB loss event near an 8-branch splitter. The results show that the proposed technique can accurately measure loss events with a spatial resolution of better than 3 m.