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Integrated optical filters such as Bragg gratings are widely used in silicon-on-insulator technology for signal processing [1], telecommunications [2] and quantum processing [3]. Sidewall gratings offer a simple geometry that has been widely used for fabricating TE filters with high extinction ratios and accurate control over the grating stop-band and central wavelength [4]. However, a major drawback...
An analysis of sidewall grating filters with sinusoidal perturbation is presented. Measurements indicate that the maximum extinction-ratio of the filters is limited by the polarisation scattering in the waveguide. We show that TM polarisation absorbers and filters offer a simple design solution that can provide extinction ratio values up to 60 dB.
We discuss the development of silicon photonic microring resonators for the emission of optical vortex beams. These devices offer great potential for high capacity short-reach optical interconnects thanks to their compactness, low power consumption and fast reconfigurability.
A compact silicon photonics multi-wavelength filter is demonstrated using superimposed sidewall Bragg gratings. We show arbitrary wavelength spacing with 8 superimposed gratings on a total footprint that is equivalent to a single Bragg grating device.
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