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Quantum-cascade lasers operating in continuous-wave mode above 90  °C at lambda~5.25  µm

Appl. Phys. Lett. 88, 051105 (2006); doi:10.1063/1.2171476

Published 31 January 2006

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A. Evans, J. Nguyen, S. Slivken, J. S. Yu, S. R. Darvish, and M. Razeghi
Center for Quantum Devices, Department of Electrical and Computer Engineering, Northwestern University, Evanston, Illinois 60208
We report on the design and fabrication of lambda~5.25  µm quantum-cascade lasers (QCLs) for very high temperature continuous-wave (cw) operation. Cw operation is reported up to a maximum temperature of 90  °C (363  K). Cw output power is reported in excess of 500  mW near room temperature with a low threshold current density of 1.4  kA/cm2 at 298  K. Room temperature average power of over 540  mW is reported at 50% duty cycle. A high thermal conductance (Gth) of 340  W/K  cm2 is reported for cw QCLs. A finite element thermal model is used to investigate the Gth and maximum cw operating temperature of the QCLs. ©2006 American Institute of Physics
History: Received 26 July 2005; accepted 13 December 2005; published 31 January 2006
Permalink: http://link.aip.org/link/?APPLAB/88/051105/1
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KEYWORDS and PACS

Keywords
PACS
  • 42.55.Px
    Semiconductor lasers; laser diodes
  • 42.60.By
    Design of specific laser systems
  • YEAR: 2006

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