Thermal Effects on Continuous and Modulation properties of Vertical Cavity Surface Emitting Laser VCSEL by simulation using Optisys7

Abstract

VCSEL surface emission lasers are considered a promising solution to many technological problems that require data transmission at very high speeds, such as Ethernet systems with data in the limits of terabits per second and others. This research included the use of Optisystem7 software for the purpose of studying the effect of temperature on the characteristics of continuous operation (CW) as characteristics (current - light), slope efficiency and threshold current, as well as studying the dynamic characteristics, which include the inclusion of this type of laser with two rates of pseudo-random data (10, 16) Gbps, By analyzing the eye-diagram pattern, quality factor QF and BER, of the laser modulation cases by fixing all the characteristics and variables of the simulation system and changing only one parameter, which is the laser temperature. The computer simulation results showed an increase in the threshold current I_th and modulation coefficient m versus increasing the temperature of the VCSEL laser. On the other hand, we found a significant decrease in the slope efficiency SE, and we also recorded a decrease in the quality factor QF versus an increase in the BER percentage with the increase in the temperature of the VCSEL laser. The simulation results also showed a great stability of the embedding quality with increasing temperature.