Performance Analysis and Optimization of a Designed 635nm Ga0.5In0.5P/(Al0.7Ga0.3)0.5In0.5P MQW SCH Red Laser by Varying Differential Gain

Abstract

In this work, the effects of variation of the differential gain on the performance characteristics of a GaInP - based 635nm multiple quantum well (MQW) separate confinement heterostructure (SCH) Red laser have been obtained through computations. The peak material gain of Ga0.5In0.5P/(Al0.5Ga0.5)0.5In0.5P MQW edge emitting laser has been obtained theoretically and has been used for analyzing the performance of the designed double-heterostructure laser under the effects of variation of differential gain. A maximum output power of 71.18 mW and a maximum modulation bandwidth of 13.85 GHz have been obtained for this designed laser at 64 mA injection current at 300K, where, the differential gain is 5.1×〖10〗^(-16) 〖cm〗^2. Furthermore a performance analysis with variation in the differential gain reveals that the maximum allowable differential gain at 300K is 6.7 ×〖10〗^(-16) 〖cm〗^2. The finalized design has been optimized for a differential gain of 6.1 ×〖10〗^(-16) 〖cm〗^2, having a minimized turn on delay, with a modulation bandwidth of 15.1 GHz and an output power of 71.38 mW.