双方向アンプを用いた分布型音響センシングの差動位相ノイズの低減に関する有岡 (D3) の論文が Optics Continuum に掲載されました。なお、Editor’s Pickに選ばれました。

Takahiro Arioka, Kentaro Nakamura. “Reduction in differential phase noise of distributed acoustic sensing with bidirectional amplifier ,” Optics Continuum, vol. 1, no.6, pp.1375-1383, (2022).

We investigate the effect of a bidirectional erbium-doped fiber amplifier on the
reduction of the differential phase noise in long-range distributed acoustic sensing by coherent
detection. We succeeded in reducing the differential phase noise at the fiber position after
the amplifier over a distance of 100 km by adjusting the gain of the bidirectional amplifier
considering the amplified spontaneous emission. This will effectively improve the accuracy of
strain measurement over long distances.