Carrier lifetime has been measured in GaInAs-AlInAs multiple quantum well structures and in thick GaInAs samples for local carrier densities between

and

cm
-3. Carrier lifetime and Auger recombination are found to be very close (±20 percent) in the two structures. The Auger limited T
0values calculated for DH and MQW lasers are found to be, respectively, 93 and 170 K. Optimization of the quantum well laser as a function of the number of wells in the active region is discussed.