Demonstration of a Tunable Microwave-Photonic Notch Filter Using Low-Loss Silicon Ring Resonators

By M. Rasras, K. Tu, D. Gill, Young-Kai Chen, A. White, S. S. Patel, A. Pomerene, D. Carothers, J. Beattie, M. Beals and 2 more. Journal of Lightwave Technology, 2009

168 citations recorded by the source corpus.

We present a fully tunable multistage narrowband optical pole-zero notch filter that is fabricated in a silicon complementary metal oxide semiconductor (CMOS) foundry. The filter allows for the reconfigurable and independent tuning of the center frequency, null depth, and bandwidth for one or more notches simultaneously. It is constructed using a Mach-Zehnder interferometer (MZI) with cascaded tunable all-pass filter (APF) ring resonators in its arms. Measured filter nulling response exhibits ultranarrow notch 3 dB BW of 0.6350 GHz, and nulling depth of 33 dB. This filter is compact and integrated in an area of 1.75 mm2. Using this device, a novel method to cancel undesired bands of 3 dB bandwidth of < 910 MHz in microwave-photonic systems is demonstrated. The ultranarrow filter response properties have been realized based on our developed low-propagation loss silicon channel waveguide and tunable ring-resonator designs. Experimentally, they yielded a loss of 0.25 dB/cm and 0.18 dB/round trip, respectively.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/1cce5b26a6e33d1c100234d4bf65d5a3e3c0ba75

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In Atomic and Molecular Physics, and Optics

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Citations in the corpus

Optical frequency comb technology for ultra‐broadband radio‐frequency photonics (2014, background): “, narrowband RF photonic filtering [180] [181], downconversion [182], and optoelectronic oscillators [183].”
Low-power, chip-based stimulated Brillouin scattering microwave photonic filter with ultrahigh selectivity (2014, background): “However, these filters typically exhibit limited resolution (GHz instead of MHz linewidths) and are plagued by trade-offs between key parameters, such as between the frequency tuning range and the resolution for multi-tap filters [9-13]; or between the peak rejection and the resolution for resonator”
Software Defined Optical Networks (SDONs): A Comprehensive Survey (2015, background): “is based on a micro-ring resonator [218] that generates multiple signal carriers with only a single laser.”