T. Keating et al., Temperature dependence of electrical and optical modulation responses of quantum-well lasers, IEEE J Q EL, 35(10), 1999, pp. 1526-1534
We present theory and experiment for high-speed optical injection in the ab
sorption region of a quantum-well laser and compare the results with those
of the electrical injection including carrier transport effect, We show tha
t the main difference between the two responses is the low-frequency roll-o
ff. By using both injection methods, me obtain more accurate and consistent
measurements of many important dynamic laser parameters, which include the
differential gain, carrier lifetime, K factor, and gain compression factor
. Temperature-dependent data of the test laser are presented which show tha
t the most dominant effect is the linear degradation of differential gain a
nd injection efficiency with increasing temperature. While the K-factor is
insensitive to temperature variation for multiple-quantum-well lasers, we f
ind that the carrier capture time and nonlinear gain suppression coefficien
t decreases as temperature increases.