基于长周期光栅滤波的光栅解调系统  被引量:5

Filter demodulation of fiber Bragg grating based on long period grating

在线阅读下载全文

作  者:沈文杰[1] 赵美蓉[1] 宋乐[1] 

机构地区:[1]天津大学精密测试技术及仪器国家重点实验室,天津300072

出  处:《激光与红外》2012年第1期72-75,共4页Laser & Infrared

基  金:精密测试及仪器国家重点实验室开放基金资助

摘  要:基于长周期光栅的边缘滤波特性,设计了一种光纤布拉格光栅的传感解调系统,适用于布拉格光栅的静态和动态解调。系统实现了3.5 nm范围内的线性解调,波长灵敏度为0.092 nm-1,波长分辨率可以达到0.01 nm。振动测量中检测信号稳定,测量频率误差在1%以内。针对长周期光栅对温度和弯曲敏感的问题,采用了适当的温度补偿和封装技术,使长周期光栅的温度漂移系数从112 pm/℃下降到45 pm/℃,显著提高了系统的稳定性。Based on the edge filter characteristics of long period grating(LPG),an experimental system is built up to achieve static and dynamic demodulation of fiber Bragg grating(FBG).The system can achieve linear dumodulation with a bandwith of 3.5 nm,an wavelength sentitivity of 0.092 nm-1 and an wavelength resolution of 0.01 nm.In vibration measuring,the detected signal is stable,and the frequency error is below 1%.In order to reduce the effect of temperature and strain on the wavelength of LPG,a scheme for the compensation of its drift is designed.Compared with 112 pm/℃ without compensation,the temperature coefficient of LPG is only 45 pm/℃ after compensation.The stability of the system is improved obviously.

关 键 词:光纤传感技术 边缘滤波 长周期光栅 温度补偿 布拉格光栅 

分 类 号:TN253[电子电信—物理电子学]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象