The reliability of high power strain-balanced Ga 0.331In 0.669As/Al 0.659In 0.341As/InP intersubband quantum cascade lasers (QCLs) emitting at a wavelength of 4.6 μm has been studied. Constant current aging is reported for two randomly selected high-reflectivity-coated QCLs with an output power over 100 mW. QCLs are tested under continuous-wave operation at a heat sink temperature of 298 K(25°C) corresponding to an internal temperature of 378 K (105°C). Over 4000 h of continuous testing is reported without any decrease in output power.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)