Impact of apodisation functions on group delay and reflectivity ripple of chirped fiber Bragg gratings
Impact of apodisation functions on group delay and reflectivity ripple of chirped fiber Bragg gratings作者机构：Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China
出 版 物：《Optoelectronics Letters》 (光电子快报（英文版）)
年 卷 期：2006年第2卷第6期
页 面：430-432页
学科分类：070207[理学-光学] 07[理学] 0702[理学-物理学]
摘 要：Apodisation technology is introduced to optimize fiber Bragg grating based on the analysis of reflectivity spectrum and group delay response of fiber Bragg gratings. The characteristics of Hamming, Gauss and super-Gauss functions are discussed and the optimization effects of the three apodisation functions on ripple smoothness of reflectivity spectrum,group delay and linear degree are compared respectively. As a result,the optimization effects of Hamming function is better than other two functions. When the bandwidth is less than ldB,Super-Gauss function is the best choice and proper parameters （G and m） of super-Gauss function can be selected expediently for wider bandwidth and better ripple smoothness of reflectivitv soectrum.
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