The analysis of the group delay ripple (GDR) generated by chirped fiber gratings is developed based on the Fabry-Perot (F-P) resonator. It shows clearly how the GDR is generated and why the periods of GDR varies along the chirped fiber gratings. It could also explain why apodization could suppress the GDR and how apodization affects the chirp of the grating. The theory could be used to devise the apodization of fiber gratings.
© 2005 Chinese Optics Letters
Zhongwei Tan, Yan Liu, Tigang Ning, and Shuisheng Jian, "The generation of group delay ripple of chirped fiber gratings," Chin. Opt. Lett. 2, 18-20 (2004)