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Demonstration of optical nonlinearity in InGaAsP/InP passive waveguides

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Original languageEnglish
Pages (from-to)524-530
Number of pages7
JournalOptical Materials
Publication statusPublished - 1 Oct 2018
Publication typeA1 Journal article-refereed


We report on the study of the third-order nonlinear optical interactions in InxGa1-xAsyP1-y/InP strip-loaded waveguides. The material composition and waveguide structures were optimized for enhanced nonlinear optical interactions. We performed self-phase modulation, four-wave mixing and nonlinear absorption measurements at the pump wavelength 1568 nm in our waveguides. The nonlinear phase shift of up to 2.5π has been observed in self-phase modulation experiments. The measured value of the two-photon absorption coefficient α2 was 19 cm/GW. The four-wave mixing conversion range, representing the wavelength difference between maximally separated signal and idler spectral components, was observed to be 45 nm. Our results indicate that InGaAsP has a high potential as a material platform for nonlinear photonic devices, provided that the operation wavelength range outside the two-photon absorption window is selected.


  • Integrated optics, Nonlinear optics, Optical devices

Publication forum classification

Field of science, Statistics Finland