Y. Moriyasu, K. Ohtani, H. Ohnishi, and H. Ohno, "Above Room-Temperature Operation of InAs/AlSb Quantum Cascade Lasers,"
in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies,
OSA Technical Digest Series (CD)
(Optical Society of America, 2007), paper JWA136.
Above room temperature operation of InAs/AlSb quantum cascade lasers emitting at around 6 µm are reported. The threshold current in pulsed mode is 5.3 kA/cm2 at 300 K and maximum operating temperature is 373 K.