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长周期光纤光栅线性滤波解调系统实验研究及改进
引用本文:王玉枝,万生鹏,张辉.长周期光纤光栅线性滤波解调系统实验研究及改进[J].应用光学,2009,30(1):125-128.
作者姓名:王玉枝  万生鹏  张辉
作者单位:南昌航空大学无损检测技术教育部重点实验室,江西,南昌330063
摘    要:在利用长周期光纤光栅(LPFG)准线性段进行线性滤波解调中,对LPFG准线性段进行一次线性拟合得到的结果误差较大,提出通过对LPFG透射谱的分段线性拟合和对LPFG进行温度控制使其谐振波长移动来选择不同的线性段,从而实现不同灵敏度解调。给出了基于DSP的实现方法及基于VC++对话框中MFC编程实现的监测界面。最后简要给出了该系统的潜在应用领域。

关 键 词:光纤光栅解调  线性滤波  LPFG  分段线性拟合  实时监测
收稿时间:2008/10/12

Experimental study and improvement for linear filtering demodulation system of LPFG
WANG Yu-zhi,WAN Sheng-peng,ZHANG Hui.Experimental study and improvement for linear filtering demodulation system of LPFG[J].Journal of Applied Optics,2009,30(1):125-128.
Authors:WANG Yu-zhi  WAN Sheng-peng  ZHANG Hui
Institution:MOE Key Laboratory of Nondestructive Test, Nanchang Hangkong University, Nanchang 330063, China
Abstract:Since the error of the result is comparatively large in the linear filtering demodulation with the quasi-linear waveband of LPFG when fitting the quasi-linear waveband of long period fiber grating(LPFG) only once, through fitting the quasi-linear waveband of LPFG in several sub-wavebands and controlling the temperature of the LPFG were introduced so as to cause the shift of the resonant wavelength of the LPFG to realize demodulation with different sensibility. The implementation based on DSP was given, the monitoring interface realized by MFC programming based on the dialog box of the VC++ was given, and the potential application areas were given as well.
Keywords:LPFG
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