然而随着干涉型光纤传感器工作频段不断向低频、甚低频段延伸，传感系统低频本底噪声及环境低频干扰严重影响了系统对低频信号的检测。
However , when the interferometric fiber-optic sensor works at the low frequency band or ultra-low frequency band , the system has been badly influenced by the low frequency system background noise and environment disturbance .
低频延伸