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Room-Temperature Operation of Discrete-Mode InGaAs–AlAsSb Quantum-Cascade Laser With Emission at \lambda =3.3 \mu m

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13 Author(s)
Phelan, R. ; Eblana Photonics Ltd., Dublin, Ireland ; Slight, T.J. ; Kelly, B. ; O'Carroll, J.
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Discrete-mode quantum-cascade lasers have been developed in the InGaAs-AlAsSb-InP materials system. For an uncoated 10-μ m-wide ridge waveguide and 3000-μm-long cavity, the laser had a threshold current density Jth of 4.2 kA·cm-2 (Ith=1.5 A) at 300 K with a slope efficiency of 80 mW/A. A stable single-mode emission near 3.3 μ m with a sidemode suppression ratio of nearly 25 dB was observed and a tuning coefficient of 0.22 nm/K was obtained in the temperature range of 253 K <; T <; 303 K.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 17 )

Date of Publication:

Sept.1, 2010

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