Passively mode-locked high-frequency dual-VCSEL system

Two VCSELs placed facing each other with one biased chip while the second chip is unbiased is shown as a promising alternative to the popularly used conventional SESAM mode-locked VECSEL to generate mode-locked pulses. We propose a theoretical model using time-delay differential rate equations and numerically show that the proposed dual-laser configuration functions as a typical gain-absorber system. Parameter space defined by laser facet reflectivities and current are used to show general trends in the exhibited nonlinear dynamics and pulsed solutions.

Automated summary

This study proposes a dual-laser configuration using two VCSELs placed facing each other as a promising alternative to conventional SESAM mode-locked VECSEL to generate mode-locked pulses. A theoretical model based on time-delay differential rate equations is used to demonstrate that this configuration functions as a typical gain-absorber system. The nonlinear dynamics and pulsed solutions are investigated by exploring the parameter space defined by laser facet reflectivities and current.