Harmonic-resonance enhanced third-harmonic generation and Kerr-effect in mid-infrared quantum-cascade lasers

Jing Bai; D. S. Citrin

doi:10.1117/12.780900

19 May 2008 Harmonic-resonance enhanced third-harmonic generation and Kerr-effect in mid-infrared quantum-cascade lasers

Jing Bai, D. S. Citrin

Author Affiliations +

Proceedings Volume 6997, Semiconductor Lasers and Laser Dynamics III; 699707 (2008) https://doi.org/10.1117/12.780900
Event: SPIE Photonics Europe, 2008, Strasbourg, France

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.

Citation Download Citation

Jing Bai and D. S. Citrin "Harmonic-resonance enhanced third-harmonic generation and Kerr-effect in mid-infrared quantum-cascade lasers", Proc. SPIE 6997, Semiconductor Lasers and Laser Dynamics III, 699707 (19 May 2008); https://doi.org/10.1117/12.780900

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