Hollow-Core-Fiber-Based Interferometer for High-Temperature Measurements
Hollow-Core-Fiber-Based Interferometer for High-Temperature Measurements
复制标题
用于高温测量的空心光纤干涉仪
DOI：
10.1109/jphot.2017.2671437
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发表时间：
2017-04-01
影响因子：
2.4
通讯作者：
Wang, Yiping
中科院分区：
文献类型：
--
作者：
Zhang, Zhe;Liao, Changrui;Wang, Yiping
我们报告了一种新型光纤传感器，用于在高达900 °C的温度范围内进行温度测量，具有出色的稳定性和可重复性。传感头由使用商用拼接器在两个单模光纤之间拼接的短空芯光纤段组成。来自引入光纤的光功率部分耦合到空芯光纤的二氧化硅包层，其余部分在空气芯中短距离传播。然后，由于偏移拼接接头，两个光束重新耦合到引出光纤的芯。由于两个光束之间的有效折射率差，在透射谱中获得干涉图案。二氧化硅和空气之间不同的热光系数导致41 pm/ °C的高温灵敏度，封闭结构确保其对外部折射率的免疫力。
We report a new fiber optic sensor for temperature measurement at a temperature range of up to 900 °C with excellent stability and repeatability. The sensing head is comprised of a short hollow-core fiber segment spliced between two single-mode fibers using a commercial splicer. Optical power from the lead-in fiber is partly coupled to silica cladding of the hollow-core fiber with the remainder propagating in air core by short distance. The two beams are then re-coupled to the core of the lead-out fiber, owing to the offset splicing joint. Due to the effective index difference between the two beams, an interference pattern in the transmission spectrum is obtained. The distinct thermo-optic coefficients between silica and air result in a high-temperature sensitivity of 41 pm/ °C, and the enclosed structure ensures its immunity to the external refractive index.