FBG光纤传感器的同步探测技术

光纤光栅传感解调系统的波长校准技术是人们关注的焦点，通常是将固定波长的FBG固定在恒温箱中，以此作为光纤光栅传感解调系统的参考元件．此方法占用了宽带光源的某个波长范围，从而制约了解调系统的波长扫描范围．构建的光纤光栅传感解调系统，将FP滤波器的驱动锯齿信号转变为方波信号，以此作为同步处理所需参考信号，省去了这个固定波长的FBG传感器，充分地利用了宽带光源的波长范围，并使得解调技术简单，同时提高了外接FBG传感器的数量．

Synchronous Detection Technology of FBG Optical Fiber Sensor

Fiber Bragg Grating Sensor Demodulation System for wavelength calibration technology is the fo- cus of attention, usually FBG sensor with fixed wavelength is fixed in a constant temperature box, as a fiber Bragg grating sensor demodulation system＇s reference components. This method takes up a broadband light source wavelength range, thereby constraining the scope of the wavelength scanning of the demodulation sys- tem. The fiber Bragg grating sensor demodulation system was built, which can change the filter driver Saw FP signal into a square wave signal as a reference signal needed for synchronization processing, eliminating the need for the fixed-wavelength FBG sensors, fully using the broadband light source wavelength range, and making the demodulation technique to become simple, while increasing the number of external FBG sensors.