The influence of gain compression factor on dynamical properties of single level InAs/GaAs quantum dot lasers

TL;DR

This study investigates how the gain compression factor affects the dynamical behavior of single-level InAs/GaAs quantum dot lasers, including output power, modulation response, and optimal gain compression value.

Contribution

It introduces a rate equation model and computational analysis to explore the impact of gain compression on quantum dot laser dynamics and identifies an optimal gain compression factor.

Findings

Gain compression influences output power and modulation response.

An optimal gain compression factor for ground state lasing is identified.

The model provides insights into laser performance optimization.

Abstract

In this paper, by representing a single level rate equation model for InAs/GaAs quantum dot lasers and computations by fourth order Runge-Kutta method some characteristics of the output laser are considered. The change of photon number in time and current and also the output power versus current with different gain compression factors are investigated for lasing from ground state (GS). Afterwards, the response function of small signal modulation for ground state in constant current but different gain compressions is surveyed. At last, we find an optimum value for gain compression factor in lasing from GS.