AlInAs/GaInAs quantum cascade (QC) lasers operating at &lgr;=11.2 &mgr;m wavelength are reported. In pulsed operation the peak power is in excess of 50 mW at 110 K heat sink temperature and the devices have been operated at temperatures as high as 200 K. Continuous wave single‐mode operation with powers &bartil;7 mW at 10 K has been achieved. This work, combined with our previous reports on QC lasers, demonstrates that these new light sources can be tailored, by suitable quantum design, over a wide wavelength range (4–11 &mgr;m) using the same heterostructure material. ©1996 American Institute of Physics.