Transient temperature response of vertical-cavity surface-emitting semiconductor lasers

Transient temperature rises in vertical-cavity surface-emitting semiconductor lasers (VCSEL's) have been calculated using Green's function methods. The influence of current spreading, material parameters, and operating conditions on the transient thermal response have been investigated. The results show that current spreading plays an important role in the transient thermal properties of VCSEL's; under pulsed operation the temperature profile in the active layer changes with time up to a delay of several microseconds. The calculated results are in good agreement with the measured data.<
>