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External cavity quantum-cascade laser tunable from 8.2  to  10.4  µm using a gain element with a heterogeneous cascade
A heterogeneous quantum-cascade structure based on two bound-to-continuum designs emitting at 9.6 and 8.4  µm is presented. Its spontaneous emission spectrum at room temperature has a ...
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High-power quantum cascade lasers (QCLs) working in continuous wave (cw) above 400  K are presented. The material was grown by low-pressure metal organic vapor-phase epitaxy and processed in...

Room-temperature, high-power, and continuous-wave operation of distributed-feedback quantum-cascade lasers at lambda~9.6  µm

Appl. Phys. Lett. 88, 201114 (2006); doi:10.1063/1.2205730

Published 17 May 2006

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S. R. Darvish, S. Slivken, A. Evans, J. S. Yu, and M. Razeghi
Center for Quantum Devices, Department of Electrical Engineering and Computer Science, Northwestern University, Evanston, Illinois 60208
High-power continuous-wave (cw) operation of distributed-feedback quantum-cascade lasers is reported. Continuous-wave output powers of 100  mW at 25  °C and 20  mW at 50  °C are obtained. The device exhibits a cw threshold current density of 1.34  kA/cm2, a maximum cw wall-plug efficiency of 1% at 25  °C, and a characteristic temperature of ~190  K in pulsed mode. Single-mode emission near 9.6  µm with a side-mode suppression ratio of >=30  dB and a tuning range of 2.89  cm–1 from 15  to  50  °C is obtained. ©2006 American Institute of Physics
History: Received 7 February 2006; accepted 22 April 2006; published 17 May 2006
Permalink: http://link.aip.org/link/?APPLAB/88/201114/1
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KEYWORDS and PACS

Keywords
PACS
  • 42.55.Px
    Semiconductor lasers; laser diodes
  • 42.60.Lh
    Laser efficiency, stability, gain, and other operational parameters
  • 42.60.Fc
    Laser beam modulation, tuning, and mode locking
  • YEAR: 2006

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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REFERENCES (9)
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