title: Investigation of monolithic passively mode-locked quantum dot lasers with extremely low repetition frequency.
abstract: The dynamical regimes and performance optimization of quantum dot monolithic passively mode-locked lasers with extremely low repetition rate are investigated using the numerical method. A modified multisection delayed differential equation model is proposed to accomplish simulations of both two-section and three-section passively mode-locked lasers with long cavity. According to the numerical simulations, it is shown that fundamental and harmonic mode-locking regimes can be multistable over a wide current range. These dynamic regimes are studied, and the reasons for their existence are explained. In addition, we demonstrate that fundamental pulses with higher peak power can be achieved when the laser is designed to work in a region with smaller differential gain.
authors: Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050 China.
authors: Tianhong
authors: T
authors: Xu
authors: Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050 China.
authors: Juncheng
authors: J
authors: Cao
authors: Dipartimento di Elettronica e Telecomunicazioni, Politecnico di Torino, Turin, 10129 Italy.
authors: Ivo
authors: I
authors: Montrosset
keywords: Bifurcation; Delayed differential equation; Mode-locked lasers; Quantum dot; Semiconductor device modeling