Intermodal frequency generation in silicon-rich silicon nitride waveguides
| Autor: | Frederic Y. Gardes, Ali Z. Khokhar, Yongmin Jung, Periklis Petropoulos, Francesca Parmigiani, T. Dominguez Bucio, David J. Richardson, Peter Horak, Cosimo Lacava |
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| Rok vydání: | 2019 |
| Předmět: |
Frequency generation
Materials science Silicon Physics::Optics chemistry.chemical_element 02 engineering and technology 01 natural sciences law.invention 010309 optics chemistry.chemical_compound law 0103 physical sciences Broadband business.industry Bandwidth (signal processing) 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Nonlinear system Wavelength Silicon nitride chemistry Optoelectronics 0210 nano-technology business Waveguide |
| Zdroj: | Photonics Research. 7:615 |
| ISSN: | 2327-9125 |
| DOI: | 10.1364/prj.7.000615 |
| Popis: | Dispersion engineering in optical waveguides allows applications relying on the precise control of phase matching conditions to be implemented. Although extremely effective over relatively narrow band spectral regions, dispersion control becomes increasingly challenging as the bandwidth of the process of interest increases. Phase matching can also be achieved by exploiting the propagation characteristics of waves exciting different spatial modes of the same waveguide. Phase matching control in this case relies on achieving very similar propagation characteristics across two, and even more, waveguide modes over the wavelengths of interest, which may be rather far from one another. We demonstrate here that broadband (>40 nm) four-wave mixing can be achieved between pump waves and a signal located in different bands of the communications spectrum (separated by 50 nm) by exploiting interband nonlinearities. Our demonstration is carried out in the silicon-rich silicon nitride material platform, which allows flexible device engineering, allowing for strong effective nonlinearity at telecommunications wavelengths without deleterious nonlinear-loss effects. |
| Databáze: | OpenAIRE |
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