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Proceedings Paper

Linewidth broadening caused by intrinsic temperature fluctuations in quantum cascade lasers
Author(s): Q. J. Wang; T. Liu
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Paper Abstract

The intrinsic narrow linewidth of quantum cascade lasers (QCLs) promises wide applications such as highsensitive trace-gas detection. However, so far limited work has been reported in intrinsic linewidth characteristics of QCLs. In this paper, we theoretically investigate the linewidth broadening caused by intrinsic temperature fluctuations in both mid-infrared and Terahertz QCLs. When microscopic features of the refractive index variations associated with the intersubband transitions and energy level broadening in mid-infrared QCLs are considered, the linewidth broadening increases up to a few hundred Hz in mid-IR QCLs.

Paper Details

Date Published: 20 January 2012
PDF: 6 pages
Proc. SPIE 8268, Quantum Sensing and Nanophotonic Devices IX, 82680M (20 January 2012); doi: 10.1117/12.907178
Show Author Affiliations
Q. J. Wang, Nanyang Technological Univ. (Singapore)
T. Liu, Nanyang Technological Univ. (Singapore)


Published in SPIE Proceedings Vol. 8268:
Quantum Sensing and Nanophotonic Devices IX
Manijeh Razeghi; Eric Tournie; Gail J. Brown, Editor(s)

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