論文(共著)が IEEE Photonics Journal に掲載されました。

論文(共著)が IEEE Photonics Journal に掲載されました。

N. Hayashi, H. Lee, Y. Mizuno, and K. Nakamura, “Observation of backward guided-acoustic-wave Brillouin scattering in optical fibers using pump-probe technique,” IEEE Photon. J., vol. 8, no. 3, 7100707 (2016).

We experimentally demonstrate the observation of backward (i.e., opposite of the direction of the pump) guided-acoustic-wave Brillouin scattering (GAWBS) using the pump–probe technique and investigate the spectral dependence on the pump–probe light power. We show that the signal-to-noise ratio (SNR) of the backward GAWBS measurement can be drastically improved by using this technique. We also observe a non-monotonic dependence of the SNR on the probe power, which indicates that optimal probe power exists for implementing GAWBS-based distributed sensors.