Improvement of second-harmonic generation in quantum-cascade lasers with true phase matching

Oana Malis, Alexey Belyanin, Claire F. Gmachl, Deborah L. Sivco, Milton L. Peabody, A. Michael Sergent, Alfred Y. Cho

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Abstract

The improvement of second-harmonic generation in quantum-cascade lasers with integrated optical nonlinearity was discussed. It was obtained by including phase-matching considerations in the design of the deep-etched ridge waveguide. To minimize the phase mismatch of the zero-order mode of the fundamental light with the second-order transverse mode of the second-harmonic light, the waveguide layer structure was optimized. By the faster decrease of the modal refractive index of the fundamental light with decreasing ridge width relative to the refractive index of the second-harmonic light, exact phase matching was made possible.

Original languageEnglish (US)
Pages (from-to)2721-2723
Number of pages3
JournalApplied Physics Letters
Volume84
Issue number15
DOIs
StatePublished - Apr 12 2004

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Malis, O., Belyanin, A., Gmachl, C. F., Sivco, D. L., Peabody, M. L., Sergent, A. M., & Cho, A. Y. (2004). Improvement of second-harmonic generation in quantum-cascade lasers with true phase matching. Applied Physics Letters, 84(15), 2721-2723. https://doi.org/10.1063/1.1697644