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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 27, Iss. 12 — Jun. 15, 2009
  • pp: 2105–2110

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

Mahmoud S. Rasras, Kun-Yii Tu, Douglas M. Gill, Young-Kai Chen, Alice E. White, Sanjay S. Patel, Andrew Pomerene, Daniel Carothers, James Beattie, Mark Beals, Jurgen Michel, and Lionel C. Kimerling

Journal of Lightwave Technology, Vol. 27, Issue 12, pp. 2105-2110 (2009)


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Abstract

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$~$mm$^{2}$. 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.

© 2009 IEEE

Citation
Mahmoud S. Rasras, Kun-Yii Tu, Douglas M. Gill, Young-Kai Chen, Alice E. White, Sanjay S. Patel, Andrew Pomerene, Daniel Carothers, James Beattie, Mark Beals, Jurgen Michel, and Lionel C. Kimerling, "Demonstration of a Tunable Microwave-Photonic Notch Filter Using Low-Loss Silicon Ring Resonators," J. Lightwave Technol. 27, 2105-2110 (2009)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-27-12-2105

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