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Proceedings Paper

Harmonic-resonance enhanced third-harmonic generation and Kerr-effect in mid-infrared quantum-cascade lasers
Author(s): Jing Bai; D. S. Citrin
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Paper Abstract

We study mid-infrared quantum-cascade lasers (QCL's) with a pair of triply harmonic resonant levels. Potential applications of such designs are discussed based on the resonant third-order nonlinear susceptibility χ(3) at the third-harmonic (TH) frequency, χ(3)(3ω; ω, ω, ω), and that at fundamental mode (FM) frequency χ(3)( ω; ω, ω,-ω). Mode overlap and the phase mismatch effect are considered in the TH power evaluation. In addition to single-photon processes, resonant two-photon processes are included in the evaluation of χ(3)( ω; ω, ω,-ω), which results in the enhancement of the positive nonlinear (Kerr) refractive index, and thus induce stronger self-phase modulation (SPM). It is concluded that QCL's with multiple-resonance design are not only favorable for tunable light emission in the near- to mid-infrared region, but are also promising candidates for spectrum broadening by SPM.

Paper Details

Date Published: 19 May 2008
PDF: 7 pages
Proc. SPIE 6997, Semiconductor Lasers and Laser Dynamics III, 699707 (19 May 2008); doi: 10.1117/12.780900
Show Author Affiliations
Jing Bai, Univ. of Minnesota, Duluth (United States)
D. S. Citrin, Georgia Institute of Technology (United States)
Unité Mixte Internationale, Georgia Tech-CNRS, Georgia Tech Lorraine (France)

Published in SPIE Proceedings Vol. 6997:
Semiconductor Lasers and Laser Dynamics III
Krassimir P. Panajotov; Marc Sciamanna; Angel A. Valle; Rainer Michalzik, Editor(s)

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