Demonstration of a 3-dB directional coupler with enhanced robustness to gap variations for silicon wire waveguides
Optics express, 2014•opg.optica.org
We demonstrate a robust 3-dB directional coupler which has a narrow silicon wire core and
a wide gap. Sensitivity to the gap variation is decreased to one tenth that of a conventional
directional coupler. Better spectral stability due to the enhanced robustness to waveguide
geometrical fluctuations was experimentally verified.
a wide gap. Sensitivity to the gap variation is decreased to one tenth that of a conventional
directional coupler. Better spectral stability due to the enhanced robustness to waveguide
geometrical fluctuations was experimentally verified.
We demonstrate a robust 3-dB directional coupler which has a narrow silicon wire core and a wide gap. Sensitivity to the gap variation is decreased to one tenth that of a conventional directional coupler. Better spectral stability due to the enhanced robustness to waveguide geometrical fluctuations was experimentally verified.
opg.optica.org
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