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- 2016 (1) (entfernen)
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- Englisch (1) (entfernen)
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- Bragg-reflection waveguide (1)
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- Parametric down-conversion (1)
- group refractive index (1)
- phasematching (1)
Institut
- Physikalisches Institut (1) (entfernen)
EU-Projektnummer / Contract (GA) number
- 257531 (1)
We investigate the dispersion properties of ridge Bragg-reflection waveguides to deduce their phasematching characteristics. These are crucial for exploiting them as sources of parametric down-conversion (PDC). In order to estimate the phasematching bandwidth we first determine the group refractive indices of the interacting modes via Fabry-Perot experiments in two distant wavelength regions. Second, by measuring the spectra of the emitted PDC photons, we gain access to their group index dispersion. Our results offer a simple approach for determining the PDC process parameters in the spectral domain, and provide important feedback for designing such sources, especially in the broadband case.