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Optics Letters

Optics Letters


  • Vol. 29, Iss. 5 — Mar. 1, 2004
  • pp: 471–473

Waveguide-coupled octagonal microdisk channel add-drop filters

Chao Li, Ning Ma, and Andrew W. Poon  »View Author Affiliations

Optics Letters, Vol. 29, Issue 5, pp. 471-473 (2004)

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We report planar waveguide-coupled octagonal microdisk channel add–drop filters on silicon nitride-on-silica substrates. Using ray optics, we show that discrete octagonal cavities have wave-front-matched four- and eight-bounce ray orbits. From a planar waveguide-coupled 50-μm-sized octagonal microdisk filter, our experiment demonstrates TM-polarized eight-bounce modes with a coupling efficiency of ~56%, Q ≈ 1150, and a finesse of ~5. Using the two-dimensional finite-difference time-domain method, we obtain qualitative agreement between measurement and simulation of a smaller-sized waveguide-coupled octagonal microdisk filter.

© 2004 Optical Society of America

OCIS Codes
(230.5750) Optical devices : Resonators
(230.7390) Optical devices : Waveguides, planar

Chao Li, Ning Ma, and Andrew W. Poon, "Waveguide-coupled octagonal microdisk channel add-drop filters," Opt. Lett. 29, 471-473 (2004)

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