多个λ/4相移紫外写入光栅的反射谱特性及应用

Reflective Spectral Character of A Multiple Quarter-wave Phase-shifts UV-written Fiber Bragg Grating and its Applications

用传输矩阵法从理论上分析计算了多个 λ/4相移紫外写入光栅的反射谱特性。可通过改变引入的λ/4相移数目、光栅长度和折射率调制幅度 ,相应改变两等强度主峰的位置及带宽的大小以符合实际应用的需求。

Reflective spectral of a multiple quarter-wave phase-shifts UV-written fiber Bragg grating (FBG) was analyzed theoretically by a transfer matrix method. Through changing the number of the quarter-wave phase-shifts, the length of grating and the value of the amplitude of index modulation Δneff, we can change the distance of the two equal power peak and the value of the bandwidth correspondingly.