The effects of cavity length on high-temperature high-power continuous wave (cw) characteristics of λ=6 μm, 15 μm wide quantum cascade lasers (QCL) were studied. It was found that for a high reflectivity (HR) coated 3 mm long laser, the maximum cw operating temperature could be achieved up to 313 K with a 17 mW output power. A high cw output power of 213 mW was also obtained for a HR coated 15 μm wide and 4 mm long laser at 298 K. The thermal resistance was also analyzed at temperatures above 283 K for HR coated lasers with different cavities.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)