Compact microring notch filters

descriptionPublicationkeyboard_double_arrow_right Article 01 Apr 2000Publisher:Institute of Electrical and Electronics Engineers (IEEE)Journal:IEEE Photonics Technology Letters, volume 12, pages 398-400 (issn: 1041-1135, eissn: 1941-0174,

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Authors: P.P. Absil; J.V. Hryniewicz; B.E. Little; R.A. Wilson; L.G. Joneckis; P.-T. Ho;

doi: 10.1109/68.839031

Compact microring notch filters

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Abstract

Microresonator filters reported so far have been all-pole-type filters. We report two experimental realizations of zero-type (notch) filters using GaAs-AlGaAs microring resonators. The first is a ring coupled to one side of a Mach-Zehnder interferometer, the Y-branch of which has an effective splitting angle of 50/spl deg/ with 0.5-dB loss. The second is a ring whose loss exactly matches the coupling to the input/output waveguide with an extinction greater than 20 dB.

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