External optical feedback-induced wavelength selection and Q-switching elimination in an InAs/InGaAs passively mode locked quantum dot laser

Abstract

In this paper we present experimental results related to the dynamic switching of the emission wavelength of a passively mode-locked InAs/InGaAs quantum dot laser. The wavelength switching is achieved through application of varying optical feedback, as opposed to varying electrical biasing conditions, whereas the different regimes of operations include pulse operation either from the ground or the excited state and dual mode locking. Furthermore, through the same technique, Q-switching elimination was achieved, allowing stable pulse amplitude, which is a highly desired feature in many applications.In this paper we present experimental results related to the dynamic switching of the emission wavelength of a passively mode-locked InAs/InGaAs quantum dot laser. The wavelength switching is achieved through application of varying optical feedback, as opposed to varying electrical biasing conditions, whereas the different regimes of operations include pulse operation either from the ground or the excited state and dual mode locking. Furthermore, through the same technique, Q-switching elimination was achieved, allowing stable pulse amplitude, which is a highly desired feature in many applications.