Analysis of the high temperature characteristics of InGaAs-AlGaAs strained quantum-well lasers

The effect of high temperature on the threshold gain and threshold current density of an In/sub 0.15/Ga/sub 0.85/As strained quantum-well laser is examined both theoretically and experimentally. It is found that the nonlinearity of the gain-versus-current relationship increases with temperature. The implications of this result on laser cavity design for optimal high-temperature performance are discussed. The effect of high temperature on modulation bandwidth is also considered. While the numerical results are specific to an In/sub 0.15/Ga/sub 0.85/As strained quantum-well laser, qualitatively they apply to all quantum-well lasers.>