光学学报, 2010, 30 (s1): s100309, 网络出版: 2010-12-22  

基于级联长周期光纤光栅的多参量传感器研究

Multi-Parameter Sensor Based on Cascaded Long-Period Fiber Gratings
作者单位
南开大学现代光学研究所, 光电信息技术科学教育部重点实验室, 天津 300071
摘要
为实现多参量同时传感测量并消除交叉敏感,提出一种新型的基于两个不同周期的级联长周期光纤光栅的多参量传感测量方案。通过对不同周期的长周期光纤光栅传感特性的研究,发现具有不同周期的、且谐振峰位于不同波段的长周期光纤光栅对相同外参量的变化具有明显的敏感差异,基于此特性可设计多参量传感器。实验中通过控制写制参数和写制周期,利用CO2激光器成功写制出具有该特性的级联长周期光纤光栅,并实验研究了该级联长周期光纤光栅的温度和折射率传感特性,实验结果显示该级联光栅中两个不同谐振峰分别对温度和折射率具有不同的响应灵敏度,可以很好地实现双参量传感测量。
Abstract
A novel multi-parameter sensor based on a cascaded long-period fiber grating with two different periods is proposed and demonstrated. The sensing properties of long-period fiber gratings with different periods are investigated in detail which indicate that the long-period fiber gratings with different periods and the resonant peak positions have obvious sensitivity differences to the same changes of the external parameters. Such properties are useful for the design of multi-parameter sensor. Through the control of the fabrication parameters and the period, the fabrication of the cascaded long-period fiber gratings is achieved with the CO2 laser. The temperature and refractive index sensing properties of the cascaded long-period fiber grating are explored through experiments. Multi-parameter sensing is realized with such cascaded long-period fiber gratings in the experiments.

崔文涛, 刘艳格, 邰伯寅, 王兵. 基于级联长周期光纤光栅的多参量传感器研究[J]. 光学学报, 2010, 30(s1): s100309. Cui Wentao, Liu Yange, Tai Boyin, Wang Bing. Multi-Parameter Sensor Based on Cascaded Long-Period Fiber Gratings[J]. Acta Optica Sinica, 2010, 30(s1): s100309.

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