The preparation and main characteristics of the InGaAs/InAlAs quantum cascade laser were given. The device has a reinforced ridge waveguide structure. The threshold current obtained at 80K is about 0 5A, and the corresponding threshold current density is about 5kA/cm 2.
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ZHANG Quang Sheng ) LIU Feng Qi ) ZHANG Yong Zhao ) WANG Zhang Guo ) Honghai Gao ) A. Krier ). INVESTIGATION ON InGaAs/InAlAs QUANTUM CASCADE LASERS''''[J]. Journal of Infrared and Millimeter Waves,2001,20(1):41~43
