Periodic structural defects in Bragg gratings and their application in multiwavelength devices

作     者：Rulei Xiao Yuechun Shi Renjia Guo Ting Chen Lijun Hao Xiangfei Chen 

作者机构：National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced Microstructures and College of Engineering and Applied Sciences Nanjing University 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2016年第4卷第2期

页      面：35-40页

核心收录：

学科分类：0808[工学-电气工程] 070207[理学-光学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Youth)(61306068) the Natural Science Foundation of Jiangsu Province of China(BK20130585,BK20140414) the National Natural Science Foundation of China(61435014,61504170,61504058) the National 863 Program(2015AA016902) 

主　　题：Periodic structural defects in Bragg gratings and their application in multiwavelength devices RGS 

摘      要：In this paper, we present the finding that periodic structural defects(PSDs) along a Bragg grating can shift the Bragg wavelength. This effect is theoretically analyzed and confirmed by numerical calculation. We find that the Bragg wavelength shift is determined by the defect size and the period of the defects. The Bragg wavelength can be well tuned by properly designing the PSDs, and this may provide an alternative method to fabricate grating-based multiwavelength devices, including optical filter arrays and laser arrays. In regards to wavelength precision, the proposed method has an advantage over the traditional methods, where the Bragg wavelengths are changed directly by changing the grating period. In addition, the proposed method can maintain grating strength when tuning the wavelength since only the period of defects is changed. This will be a benefit for devices such as arrays.