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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 28, Iss. 20 — Oct. 15, 2010
  • pp: 2964–2968

Sharp Fano Resonances From a Two-Mode Waveguide Coupled to a Single-Mode Ring Resonator

Alexander C. Ruege and Ronald M. Reano

Journal of Lightwave Technology, Vol. 28, Issue 20, pp. 2964-2968 (2010)


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Abstract

Coupling between a single-mode ring resonator and a two-mode bus waveguide is investigated theoretically and experimentally to achieve sharp resonant lineshape slopes of the difference of the two mode power transmissions. Fano-shaped output lineshapes are shown to depend on the coupling coefficients, relative power distribution, and relative phase difference of the two input modes. A device is fabricated in a polymer and silicon dioxide material system by a photolithographic process. The transmissions of the two modes are measured via on-chip add-drop mode filters. Measurements of the two-mode-coupled resonator device result in a lineshape slope of 27.1 nm$^{-1}$. The technique exploits spatial mode orthogonality to realize co-located coupling ports to the resonator. Photonic circuit layouts are simplified and the number of waveguide crossings are reduced in applications utilizing a dense array of resonators producing sharp asymmetrical Fano-shaped resonance transmissions.

© 2010 IEEE

Citation
Alexander C. Ruege and Ronald M. Reano, "Sharp Fano Resonances From a Two-Mode Waveguide Coupled to a Single-Mode Ring Resonator," J. Lightwave Technol. 28, 2964-2968 (2010)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-28-20-2964

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