Continuous-wave distributed-feedback quantum-cascade lasers on a Peltier cooler

Aellen, Thierry; Blaser, Stéphane; Beck, Mattias; Hofstetter, Daniel; Faist, Jérôme; Gini, Emilio
September 2003
Applied Physics Letters;9/8/2003, Vol. 83 Issue 10, p1929
Academic Journal
Continuous-wave operation of λ∼9 μm distributed-feedback quantum-cascade lasers is reported up to a temperature of 260 K. Single-frequency emission with a side mode suppression ratio of >=27 dB and with a tuning range of 5 cm[sup -1] between 200 and 245 K (a tunability of -0.078 cm[sup -1]/K and -0.764 cm[sup -1]/W) is obtained for the junction-down mounted buried heterostructure devices. Uncoated lasers display an output power of up to 18 mW at 180 K and still 1 mW at 250 K. Lasers with high-reflection coated facets could be operated up to 260 K. © 2003 American Institute of Physics.


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