高稳定光纤布拉格光栅波长标准器的研究

Research on High Stability Fiber Bragg Grating Wavelength Standard

依据JJF 1804-2020《布拉格光纤光栅传感网络分析仪校准规范》,应使用稳定的参考标准光纤光栅对光纤光栅解调仪的波长解调示值进行校准。采用特殊设计的应力释放结构并利用智能控制算法及半导体制冷技术,实现高精度的温度控制,研制了一组高稳定的光纤光栅波长标准器。通过重复性考核并与商用光纤光栅测量比对,证明研制的光纤光栅波长标准器性能远优于校准规范要求,从而极大地提高了光纤光栅解调仪的校准不确定度。

Fiber Bragg grating(FBG) demodulators are widely used in various fields, including civil engineering,aviation, healthcare, and national defense. To comply with the Calibration Specification for Optical Fiber Bragg Grating Sensor Network Analyzers(JJF 1804-2020), it is crucial to calibrate the wavelength demodulation values of the FBG demodulator using a stable reference standard FBG. In this study, we developed a set of high stability FBG wavelength reference standards by utilizing a specially designed stress relief structure, intelligent control algorithm, and semiconductor refrigeration technology to achieve high precision temperature control. Through repeatability testing and comparison to commercial FBG measurements, we demonstrate that the performance of our developed FBG wavelength standards far exceeds the requirements of the calibration specification. Our results show that our FBG demodulator calibration procedure significantly improves the calibration uncertainty of the instrument.