Time-Domain Traveling Wave Model of Single-Section Quantum Dot Mode-Locked Lasers with Optical Feedback

作     者：Xuefang Xiao Zewang Zhang Xiupu Zhang Xuefang Xiao;Zewang Zhang;Xiupu Zhang

作者机构：School of Opto-electronic and Communication EngineeringXiamen University of TechnologyXiamen 361024FujianChina Key Laboratory of Communication Network and Information Processing in Fujian ProvinceXiamen 361024FujianChina Photonics Labs.Department of Electrical and Computer EngineeringConcordia UniversityMontreal QC H3G 1M8Canada 

出 版 物：《Journal of Harbin Institute of Technology(New Series)》 (哈尔滨工业大学学报（英文版）)

年 卷 期：2021年第28卷第3期

页      面：45-52页

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

基　　金：Sponsored by the Research Project of Xiamen University of Technology(Grant No.KCZX2019148) the Research Project of Xiamen Municipal Bureau of Science and Technology(Grant No.3502Z20193055) 

主　　题：quantum dot structure passively mode-locked laser optical feedback 

摘      要：The optical feedback modulations of a passively mode-locked semiconductor laser with quantum dot structure were investigated in this study. The delay-induced dynamics of QD MLL under the condition of optical feedback have been studied by exploiting a time domain traveling wave(TDTW) model. The conventional TDTW model was improved to make it suitable for studying optical feedback system, especially the system with long external cavity structure. Combing the TDTW model with optical feedback and carrier rate equations, the pulse variation of a single section QD MLL was studied. This new model shows good agreement with the published experimental data. The roundtrip time and local light intensity modulation to the pulse evolution of QD MLL were studied. The results show that when the time for a light to go to and return from external cavity is equal to the integral times of the period of laser pulse without external feedback, resonance will be formed, and the period of pulse sequence is the shortest. The results also show that the stronger the local light intensity modulation is, the shorter the pulse period is.