Parametric study of the transient period characteristics of distributed feedback laser diodes

Subject of study. The operating response characteristics for a distributed feedback laser model has presented. Aim of study. A numerical optimization of model parameters is used to reduce the laser transient period by analyzing the effects of the laser injection current, the temperature variation, the dc-bias level, and the gain compression factor on transient period characteristics. Method. The transient period value decreases when the current ratio (i.e., injection current/threshold current) is increased. Main results. Significant reduction is observed in the relaxation oscillation period and the laser turn-on time delay as the effect of increasing the injection current and/or the biasing current. Practical significance. However, varying temperatures resulted in distributed feedback operating in the off-mode region due to increasing the transient period value. Meanwhile, the relaxation oscillation period value is reduced significantly with a faster stabilization period due to the damped sinusoidal oscillations as a result of increasing the & epsilon; value. & COPY; 2023 Optica Publishing Group