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Applied Optics

Applied Optics


  • Vol. 41, Iss. 21 — Jul. 20, 2002
  • pp: 4394–4399

Coupling-loss reduction of a vertically coupled microring resonator filter by spot-size-matched busline waveguides

Tomoyuki Kato, Shuichi Suzuki, Yasuo Kokubun, and Sai Tak Chu  »View Author Affiliations

Applied Optics, Vol. 41, Issue 21, pp. 4394-4399 (2002)

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To improve the input-output coupling loss of a vertically coupled microring resonator filter, we fabricated microring resonators on an antiresonant reflecting optical waveguide (ARROW) with a large spot size and on the rectangular busline waveguide with a spot-size transformer. The spot size and the tapered structure were optimally designed from the viewpoint of spot-size matching to single-mode fibers and the reduction of radiation loss. Clear dropping responses were demonstrated for the ARROW-based microring resonator filters, and the coupling loss was successfully reduced by 22 dB.

© 2002 Optical Society of America

OCIS Codes
(060.4230) Fiber optics and optical communications : Multiplexing
(130.3120) Integrated optics : Integrated optics devices
(230.7380) Optical devices : Waveguides, channeled

Original Manuscript: September 10, 2001
Revised Manuscript: February 5, 2002
Published: July 20, 2002

Tomoyuki Kato, Shuichi Suzuki, Yasuo Kokubun, and Sai Tak Chu, "Coupling-loss reduction of a vertically coupled microring resonator filter by spot-size-matched busline waveguides," Appl. Opt. 41, 4394-4399 (2002)

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