取样光栅周期中等效啁啾的实验研究

Experimental Research on the Equivalent Chirp in the Grating Period of Sampled Bragg Grating

在 Moiré取样 Bragg光纤光栅 (SBG)的理论基础上 ,首次通过用相位模板旋转和 2次曝光的方法 ,得出了带有取样啁啾的 SBG的各个 Fourier级数的等效啁啾率。实验数据和理论值的误差小于 9%。

Based on the proposed concept of Moire´ sampling Bragg grating (SBG), the equivalent chirp rates of various Fourier orders in a SBG with chirp in the sampling period is demonstrated for the first time via a simple novel experimental method using phase mask rotation and dual exposure technique. Difference between experimental data and calculated results is less than 9%.