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21 May 2012

Singlemode quantum cascade lasers with power dissipation below 1 W
Electron. Lett. -- 24 May 2012 -- Volume 48, Issue 11, p.646–647

B. Hinkov (1), A. Bismuto (1), Y. Bonetti (1), M. Beck (1), S. Blaser (2) and J. Faist (1)
(1) Swiss Federal Institute of Technology (ETH) Zürich, Institute for Quantum Electronics, Zürich, Switzerland
(2) Alpes Lasers SA, Neuchâtel, Switzerland

Presented are narrow-ridge, singlemode (λ=4.49 µm) quantum cascade lasers with low power consumption in continuous-wave operation. Episide up mounted 3 µm-wide and 1 mm-long devices with high-reflectivity backside coating show an electrical dissipation at laser threshold as low as 840 mW at 20°C. The devices can be tuned singlemode and mode-hop free between −30°C and +50°C and in a range of injected electrical power of 0.7 and 1.3 W with a sidemode suppression ratio better than 27 dB.

Full text available on the IET Digital Library.