A novel quasi-phase-matching frequency doubling technique

Xu Guang Huang, Michael R. Wang

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


A new quasi-phase-matching technique for efficient second-harmonic generation is reported. It is based on the spatial periodic modulation of the light intensity along the propagation direction, rather than the conventional spatial periodic modulation of the nonlinear optical coefficients. It can be realized by using a novel dual-channel waveguide frequency doubler structure for the desired light intensity distribution. This dual-channel waveguide device has major advantages including very small beam size, high light intensity within long nonlinear-waveguide interaction length, highly efficient second-harmonic generation, ease in fabrication of the nonlinear channel waveguides without any spatially periodic poling, and low waveguide propagation losses. The new quasi-phase-matching technique can also be applied to third-harmonic generation and other nonlinear optics processes.

Original languageEnglish (US)
Pages (from-to)235-238
Number of pages4
JournalOptics Communications
Issue number1-6
StatePublished - May 1 1998


  • Dual-channel waveguide
  • Nonlinear optics
  • Second-harmonic generation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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