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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。
The dynamic wavelength demodulation technique based on tunable filter (TOF) with auto-tracking fiber Bragg grating was studied. Experiments show that the demodulator is especially suitable for the detection of micro-amplitude dynamic wavelength changes in the presence of significant static wavelength changes in FBG (FBG) with a dynamic wavelength detection resolution of 0.007pm / Hz. At power-on, TOF has automatic tracking capability for fiber gratings with a center wavelength of 1292.50 to 1308.50 nm, and overcomes the impact of TOF instability on the system.