Faculté des sciences

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

Aellen, Thierry ; Blaser, Stéphane ; Beck, Mattias ; Hofstetter, Daniel ; Faist, Jérôme ; Gini Emilio

In: Applied Physics Letters, 2003, vol. 83, p. 1929-1931

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–1 between 200 and 245 K (a tunability of –0.078 cm–1/K and –0.764 cm–1/W) is obtained for the junction-down mounted... Plus

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    Summary
    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–1 between 200 and 245 K (a tunability of –0.078 cm–1/K and –0.764 cm–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.