Dependence of Brillouin frequency shift on water absorption ratio in polymer optical fibers
Dependence of Brillouin frequency shift on water absorption ratio in polymer optical fibers
复制标题
DOI：
10.1063/1.4953388
复制
发表时间：
2016-06
影响因子：
3.2
通讯作者：
K. Minakawa;K. Koike;N. Hayashi;Y. Koike;Y. Mizuno;Kentaro Nakamura
中科院分区：
文献类型：
--
作者：
K. Minakawa;K. Koike;N. Hayashi;Y. Koike;Y. Mizuno;Kentaro Nakamura
研究了聚甲基丙烯酸甲酯基聚合物光纤（POFs）中布里渊频移（BFS）与吸水率的关系，以阐明湿度对POFs布里渊传感器的影响。的BFS，推导间接使用超声波脉冲回波技术，单调下降的吸水率的增加，主要是因为在杨氏模量的减少。对于相同的吸水率，在较高的温度下，BFS的变化较大。在40、60和80 °C下的最大BFS变化（绝对值）分别为158、285和510 MHz（对应于109 °C、1016 °C和1030 °C的温度变化）。因此，在POF中实施基于布里渊散射的应变/温度传感器时，特别是在较高温度下，针对湿度的一些对策是必不可少的。另一方面，基于布里渊的分布式湿度传感器可以通过利用BFS对POF中的水吸收的依赖性来开发。
We studied the dependence of the Brillouin frequency shift (BFS) on the water-absorption ratio in poly(methyl methacrylate)-based polymer optical fibers (POFs) to clarify the effect of the humidity on POF-based Brillouin sensors. The BFS, deduced indirectly using an ultrasonic pulse-echo technique, decreased monotonically as the water absorption ratio increased, mainly because of the decrease in the Young's modulus. For the same water absorption ratio, the BFS change was larger at a higher temperature. The maximal BFS changes (absolute values) at 40, 60, and 80 °C were 158, 285, and 510 MHz, respectively (corresponding to the temperature changes of ∼9 °C, ∼16 °C, and ∼30 °C). Thus, some countermeasure against the humidity is indispensable in implementing strain/temperature sensors based on Brillouin scattering in POFs, especially at a higher temperature. On the other hand, Brillouin-based distributed humidity sensors might be developed by exploiting the BFS dependence on water absorption in POFs.