High-temperature continuous-wave operation of low power consumption single-mode distributed-feedback quantum-cascade lasers at λ∼5.2 μm

Feng Xie; Caneau, Catherine G.; LeBlanc, Herve P.; Visovsky, Nick J.; Coleman, Sean; Hughes, Lawrence C.; Chung-en Zah
August 2009
Applied Physics Letters;8/31/2009, Vol. 95 Issue 9, p091110
Academic Journal
Continuous-wave operation of a distributed-feedback quantum-cascade laser in a packaged module is demonstrated up to a heat sink temperature of 80 °C with an output power of greater than 10 mW and a power consumption of less than 3.8 W. Single longitudinal mode emission near 5.24 μm is observed over a temperature range from 10 to 80 °C with a side mode suppression ratio greater than 20 dB limited by the instrumentation. A single spatial mode is determined with far-field pattern measurement. The above performance is achieved using a buried heterostructure and a small cavity of 7.6 μm×1.5 mm.


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