マルチコア光ファイバ中の前方ブリルアン散乱の観測に関する林（OB）の論文が Applied Physics Express に掲載されました。
N. Hayashi, Y. Mizuno, K. Nakamura, S. Y. Set, and S. Yamashita, “Experimental observation of spontaneous depolarized guided acoustic-wave Brillouin scattering in side cores of a multi-core fiber,” Appl. Phys. Express, vol. 11, no. 6, 062502 (2018)
Spontaneous depolarized guided acoustic-wave Brillouin scattering (GAWBS) was experimentally observed in one of the side cores of an uncoated multi-core fiber (MCF). The frequency bandwidth in the side core was up to ~400 MHz, which is 0.5 times that in the central core. The GAWBS spectrum of the side core of the MCF included intrinsic peaks, which had different acoustic resonance frequencies from those of the central core. In addition, the spontaneous depolarized GAWBS in the central/side core was unaffected by the spontaneous depolarized GAWBS in the other core. These results will lead to the development of polarization/phase modulators using an MCF.