High power spatial single-mode quantum cascade lasers at 8.9 $\mu$m
  High performance of InP-based quantum cascade lasers emitting at $\lambda$ ~ 9$\mu$m are reported. Thick electroplated gold layer was deposited on top of the laser to improve heat dissipation. With one facet high reflection coated, the devices produce a maximum output power of 175mW at 40% duty cycle at room temperature and continuous-wave operation up to 278K. 
Sebastien Forget (MPQ), Clement Faugeras (MPQ), Jean Yves Bengloan   (Thales), Michel Calligaro (Thales), Olivier Parillaud ...