级联长周期光纤光栅作为长周期光纤光栅的一个特殊形式,具有许多特殊性质。本文研究了级联长周期光纤光栅理论以及其光谱随级联光纤长度和光栅强度变化的特性,并与实验结果进行了比较,为级联长周期光纤光栅传感和设计级联长周期光纤光栅器件提供了依据。 As a special form of long-period fiber gratings, cascaded long-period fiber gratings have many special properties. In this paper, the theory of cascaded long-period fiber gratings and the change of their spectra with the length of cascaded fiber and the intensity of grating are studied and compared with the experimental results. The results show that the cascaded long-period fiber gratings can sense and design cascaded long-period fiber gratings Devices provide the basis.