title: Asymmetrical sampling structure to improve the single-longitudinal-mode property based on reconstruction-equivalent-chirp technology.
abstract: We propose a special asymmetric sampling structure based on reconstruction-equivalent-chirp technology to effectively suppress the side mode oscillation in the zeroth channel in a sampled Bragg grating semiconductor laser, which improves greatly the single-longitudinal mode (SLM) oscillation capability of the laser. A numerical simulation is performed. The proposed structure guarantees a normalized threshold gain margin between the main mode and the side mode larger than 0.3. A high side-mode suppression ratio is also observed. The proposed method would be of great importance for the fabrication of high-performance and wideband multiwavelength laser arrays with each laser operating in SLM.
authors.affiliation: Microwave-Photonics Technology Laboratory, Nanjing National Laboratory of Microstructures, School of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China. zhou-yating@163.com
authors.forename: Yating
authors.initials: Y
authors.lastname: Zhou
authors.forename: Yuechun
authors.initials: Y
authors.lastname: Shi
authors.forename: Simin
authors.initials: S
authors.lastname: Li
authors.forename: Shengchun
authors.initials: S
authors.lastname: Liu
authors.forename: Xiangfei
authors.initials: X
authors.lastname: Chen