Pressure Sensing Based on Nonconventional Air-Guiding Transmission Windows in Hollow-Core Photonic Crystal Fibers
Pressure Sensing Based on Nonconventional Air-Guiding Transmission Windows in Hollow-Core Photonic Crystal Fibers
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DOI：
10.1109/jlt.2009.2014648
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发表时间：
2009-06
影响因子：
4.7
通讯作者：
R. D. de Oliveira;C. D. de Matos;J. Hayashi;C. Cordeiro
中科院分区：
文献类型：
--
作者：
R. D. de Oliveira;C. D. de Matos;J. Hayashi;C. Cordeiro
在设计工作在1550 nm的商用空芯光子晶体光纤中，识别出可见光谱范围内的非常规芯引导传输窗口。这些窗口很可能与高阶包层光子带隙有关，并被发现高度依赖于包层微结构，因此受到压力诱导应力/变形的影响。20厘米长的光纤样品随后被用来演示两种不同设置的简单且与温度无关的静液压传感。在第一种设置中，压力从外部施加到纤维上，导致工作在数百kgf/cm2(或几十兆帕)范围内，而第二种设置直接向纤维内部微结构施加压力，并且对压力很敏感，压力降到kgf/cm2(百分之一兆帕)的分数。压力直接转换为传输功率的事实极大地简化了所需的传感器询问设置。
Non-conventional core-guided transmission windows within the visible spectral range are identified in commercial hollow-core photonic crystal fibers designed to operate at 1550 nm. These windows are likely to be related to higher-order cladding photonic bandgaps and are found to be highly dependent on the cladding microstructure, thus being affected by pressure-induced stress/deformation. 20-cm-long fiber samples are then used to demonstrate simple and temperature-independent hydrostatic pressure sensing with two different setups. While in the first setup pressure is externally applied to the fiber and results in operation in the hundreds of kgf/cm 2 (or tens of MPa) range, the second setup applies pressure directly to fiber internal microstructure and is sensitive to pressures down to a fraction of kgf/cm 2 (hundredths of MPa). The fact that pressure is directly transduced into transmitted power greatly simplifies the required sensor interrogation setup.