光ファイバ増幅器の使用を抑えたブリルアン光相関領域反射計の低コストな実装に関する水野助教とHan（OB）の論文が Electronics Letters に掲載されました。また、同号に特集記事が掲載されました。
Y. Mizuno, G. Han, K. Noda, H. Lee, and K. Nakamura, “Low-cost Brillouin optical correlation-domain reflectometry involving merely one fibre amplifier,” Electron. Lett., vol. 55, no. 13, pp. 754-756 (2019).
Featured: “Reflect on this: Optical reflectometry implemented using only one fibre amplifier for distributed strain sensing,” Electron. Lett., vol. 55, no. 13, p. 720 (2019).
Brillouin optical correlation-domain reflectometry (BOCDR) is one of the fibre-optic distributed strain and temperature sensing systems. Conventionally, BOCDR has been implemented using three erbium-doped fibre amplifiers (EDFAs) to enhance the signal-to-noise ratio (SNR) of the measurement. However, the use of multiple EDFAs has restricted the size and cost efficiency of the system. In this work, we show that, among the three EDFAs previously employed, the one in the Stokes path plays the most important role in enhancing the SNR. Subsequently, we implement BOCDR using only one EDFA and demonstrate distributed strain sensing. The measurement error is also investigated as a function of the output power of a light source.