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Room temperature continuous wave operation of λ ∼ 3–3.2 μm quantum cascade lasers

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6 Author(s)
Bandyopadhyay, N. ; Center for Quantum Devices, Department of Electrical Engineering and Computer Science, Northwestern University, Evanston, Illinois 60208, USA ; Bai, Y. ; Tsao, S. ; Nida, S.
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We demonstrate quantum cascade lasers emitting at wavelengths of 3–3.2 μm in the InP-based material system. The laser core consists of GaInAs/AlInAs using strain balancing technique. In room temperature pulsed mode operation, threshold current densities of 1.66 kA/cm2 and 1.97 kA/cm2, and characteristic temperatures (T0) of 108 K and 102 K, are obtained for the devices emitting at 3.2 μm and 3 μm, respectively. Room temperature continuous wave operation is achieved at both wavelengths.

Published in:

Applied Physics Letters  (Volume:101 ,  Issue: 24 )

Date of Publication:

Dec 2012

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