Ideas about applications of LPFG to band-pass filters, optical add/drop multiplexing, optical fiber sources, coupling of fibers, optical fiber polarizers and novel sensing are illustrated.

• 阐明了长周期光纤光栅用于带通滤波、光上下路复用、光纤光源、光纤耦合、偏振器件、新型传感等新技术领域的思路，给出了具体实现方法。