干涉型光纤传感器灵敏度和精度仿真优化及性能测试

Study on the influencing factors of sensitivity and accuracy of interferometric optical fiber sensors

为优化干涉型光纤传感器监测性能,研究影响干涉型光纤传感器灵敏度和精度因素。研究光源线宽对干涉型光纤传感器灵敏度的影响,调整单色光照射下干涉型光纤传感器磁场最小值,获取考虑光源线宽下干涉型光纤传感器最高相位灵敏度以及探测直流磁场最小值与探测交流磁场最小值,研究得出光源线宽越窄,干涉型光纤传感器灵敏度越大,光源线宽越宽,探磁灵敏度减小;考虑光源线宽分析不同光源谱对干涉型光纤传感器精度的影响,光源谱对干涉光输出相位影响即对干涉型光纤传感器精度的影响,研究得出洛伦兹光源线宽对干涉型光纤传感器精度影响最显著,高斯光源次之,矩形光源最弱。经验证,所提方法研究干涉型光纤传感器灵敏度和精度的影响因素结果与实际情况一致,可作为有效研究方法使用。

In order to optimize the monitoring performance of interferometric optical fiber sensors,the sensitivity and precision factors of interferometric optical fiber sensors are studied.The effect of light source line width on the sensitivity of interferometric optical fiber sensors is studied,and the minimum magnetic field of interferometric optical fiber sensors under single-color light irradiation is adjusted.The maximum phase sensitivity of the interferometric optical fiber sensor considering the width of the optical source line and the minimum value of the detection DC magnetic field and the detection AC magnetic field are obtained.The narrower the width of the optical source line,the greater the sensitivity of the interferometric optical fiber sensor,the wider the width of the optical source line,and the less magnetic sensitivity.Considering the influence of optical source width analysis on the accuracy of interferometric optical fiber sensors,and the influence of optical source spectrum on the phase of interferometric optical output,the influence of Lorentz optical source width on the accuracy of interferometric optical fiber sensors is studied.The most significant impact on the accuracy of interferometric optical fiber sensors,The Gaussian light source is followed by the rectangular light source.It is verified that the results of the proposed method to study the influence factors of sensitivity and precision of the interferometric optical fiber sensor are consistent with the actual situation and can be used as an effective research method.