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阵列波导光栅解调的准分布式光纤光栅传感器   总被引:4,自引:0,他引:4  
黄景堂  黄旭光  赵华伟 《光学学报》2008,28(11):2067-2071
从理论上和实验上研究了一种操作简单、响应速度快,价格低廉和高分辨率的基于阵列波导光栅(AWG)的准分布式光纤布拉格光栅(FBG)传感器.该传感系统采用了阵列波导光栅双通道强度解调技术对光纤光栅的布拉格波长和温度进行精确的解调.实验结果表明,该系统对宽带宽光纤光栅的布拉格波长和温度解调均具有高线性度,考虑系统稳定性及光纤布拉格光栅之间的串扰影响,波长测量精度仍可达2 pm,温度测量精度优于0.2℃.  相似文献   
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We present an interrogating technique employing a reformative arrayed waveguide grating without output waveguides in combination with a linear charge coupled device. A simple and effective data processing method called area equalized point is used to improve the system resolution. The simulation results show that the wavelength shift of a fibre Bragg grating with temperature can be precisely measured by this interrogation technique. The temperature accuracy and wavelength resolution of the sensor system are smaller than 0.08℃ and 0.8pm, respectively. If the FBG 3dB-bandwidth is 0.2nm with the wavelength spacing between two adjacent FBGs of 1.4 nm, the temperature and wavelength errors caused by crosstalk are respectively 0.01℃ and 0. 1 pm.  相似文献   
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