GHz-bandwidth optical filters based on high-order silicon ring resonators

Kotura Inc., 2630 Corporate Place, Monterey Park, CA 91754, USA.
Optics Express (Impact Factor: 3.49). 11/2010; 18(23):23784-9. DOI: 10.1364/OE.18.023784
Source: PubMed


Previously demonstrated high-order silicon ring filters typically have bandwidths larger than 100 GHz. Here we demonstrate 1-2 GHz-bandwidth filters with very high extinction ratios (~50 dB). The silicon waveguides employed to construct these filters have propagation losses of ~0.5 dB/cm. Each ring of a filter is thermally controlled by metal heaters situated on the top of the ring. With a power dissipation of ~72 mW, the ring resonance can be tuned by one free spectral range, resulting in wavelength-tunable optical filters. Both second-order and fifth-order ring resonators are presented, which can find ready application in microwave/radio frequency signal processing.

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Available from: Dazeng Feng, Sep 20, 2015
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    • "A hybrid version incorporating silicon photonic waveguides was recently reported [14]. Another more complex scheme has also been recently presented [15], where 1–2 GHz-bandwidth filters with very high extinction ratios ($50 dB) have been demonstrated. With a power dissipation of $72 mW, the ring resonance can be tuned (thermal control) by one free spectral range, resulting in wavelength-tunable optical filters. "
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