基于可调谐滤波器的带中心波长自动跟踪光纤光栅动态波长解调技术的研究

Fiber Bragg grating dynamic interrogation technique based on the tunable optical filter

研究了基于可调谐滤波器(TOF)的带中心波长自动跟踪光纤光栅动态波长解调技术.实验表明,解调仪特别适合在传感FBG(fiber Bragg grating)存在大幅度静态波长变化时对微幅度动态波长变化进行检测,动态波长检测分辨率为0.007pm/Hz.上电时,TOF对中心波长为1292.50～1308.50nm范围内的光纤光栅具有自动跟踪的能力,克服了TOF不稳定对系统的影响.

A fiber Bragg Grating dynamic interrogation technique based on the tunable optical filter（TOF） was investigated. The experiments demonstrate this interrogation technique is very suitable for the micro-amplitude dynamic wavelength detection existing in the large static wavelength change of the FBG, the dynamic wavelength detection resolution is 0. 007pm√Hz. The TOF can track the FBG center wavelength between 1298.50nm and 1308.50nm when the system is power-on, moreover it can overcome the negative influence due to the instability of the TOF.