In this paper,the principle of fiber Bragg gratings(FBG′s) tuning method based on elastic beam is analyzed,an axial strain transfer coefficient is introduced,and a wide-band FBG tuning without chirp by the method of part pure bending is proposed.
分析了基于弹性梁的光纤光栅调谐原理,引入了轴向应变传递系数的概念,提出利用部分纯弯曲调谐方法,可实现光纤光栅宽带无啁啾调谐。