Okawa Youhei, Kendy Yamashita Rodrigo, Kishi Masato, Hotate Kazuo
Opt Express. 2020 Jul 6;28(14):21310-21317. doi: 10.1364/OE.396811.
Higher spatial resolution of the reflection spectrum measurement of Brillouin dynamic grating (BDG) was achieved by controlling phonon power distribution. We experimentally demonstrate the improvement effect of the light-source intensity-modulation method, proposed recently in a correlation-domain technique, and successfully detected an 8-cm cooled section in a 100-m-long polarization-maintaining fiber. Our method can improve the spatial resolution of BDG measurements, leading to high resolution discriminative and distributed fiber sensing of temperature and strain.
通过控制声子功率分布，实现了布里渊动态光栅（BDG）反射光谱测量的更高空间分辨率。我们通过实验证明了最近在相关域技术中提出的光源强度调制方法的改进效果，并成功检测到了100米长保偏光纤中的一个8厘米冷却段。我们的方法可以提高BDG测量的空间分辨率，从而实现对温度和应变的高分辨率鉴别和分布式光纤传感。
