Referenced Items are not available for this document.
The operation of quantum cascade lasers at a wavelength (λ≃9.3 μm) well within the 8-13-μm atmospheric window is reported. A detailed study of intersubband luminescence in a vertical transition structure shows linewidths as narrow as ~10 meV at cryogenic temperatures, increasing to 20 meV at room temperature. Pulsed operation is demonstrated up to 220 K with a peak power ≈10 mW and ≈35 mW at 140 K. The temperature dependence of the threshold current density (J th) is described by a high T0 (128 K), Jth is also systematically studied as a function of cavity length to determine the peak gain and waveguide losses. Continuous-wave, single-mode operation is demonstrated up to 30 K with powers ≈2 mW
Published in:
Quantum Electronics, IEEE Journal of
(Volume:33
,
Issue:
1
)
Date of Publication: Jan 1997
- Page(s):
- 89 - 93
- ISSN :
- 0018-9197
- INSPEC Accession Number:
- 5475395
- Digital Object Identifier :
- 10.1109/3.554898
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Jan 1997
- Sponsored by :
- IEEE Photonics Society
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