Si3N4 ring resonator-based microwave photonic notch filter with an ultrahigh peak rejection

Abstract

We report a simple technique in microwave photonic (MWP) signal processing that allows the use of an optical filter with a shallow notch to exhibit a microwave notch filter with anomalously high rejection level. We implement this technique using a low-loss, tunable Si3N4 optical ring resonator as the optical filter, and achieved an MWP notch filter with an ultra-high peak rejection > 60 dB, a tunable high resolution bandwidth of 247-840 MHz, and notch frequency tuning of 2-8 GHz. To our knowledge, this is a record combined peak rejection and resolution for an integrated MWP filter.

8 pages, 5 figures

References in corpus (3)

• Comb-Based Radio-Frequency Photonic Filters with Rapid Tunability and High Selectivity
• Tailorable Stimulated Brillouin Scattering in Nanoscale Silicon Waveguides
• Frequency agile microwave photonic notch filter with anomalously-high stopband rejection

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• Frequency agile microwave photonic notch filter with anomalously-high stopband rejection
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• Nonlinear Integrated Microwave Photonics
• Ultrahigh Dynamic Range and Low Noise Figure Programmable Integrated Microwave Photonic Filter
• Tunable Photonic Radiofrequency Filter with An Ultra-high Out-Of-Band Rejection
• Universal Silicon Microwave Photonic Spectral Shaper
• New-generation silicon photonics beyond the singlemode regime
• Low power, chip-based stimulated Brillouin scattering microwave photonic filter with ultrahigh selectivity
• On-chip multipurpose microwave frequency identification