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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 1 — Jan. 7, 2008
  • pp: 456–465

Air-trench splitters for ultra-compact ring resonators in low refractive index contrast waveguides

Nazli Rahmanian, Seunghyun Kim, Yongbin Lin, and Gregory P. Nordin  »View Author Affiliations

Optics Express, Vol. 16, Issue 1, pp. 456-465 (2008)

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We demonstrate air-trench splitters in low index contrast perfluorocyclobutyl (PFCB) waveguides. Splitters are fabricated by etching 800 nm wide high aspect ratio (18:1) trenches. The measured optical loss is 0.4 dB/splitter. The reflection/transmission splitting ratio is 0.859/0.141, which closely matches two-dimensional finite difference time domain (2D-FDTD) simulation results. Air-trench splitters and bends are used to demonstrate an ultra-compact ring resonator (RR) with a size reduction of 1,700 compared to a RR based on traditional curved waveguides in the same material system. A comparison between the RR’s measured and analytically calculated performance shows close agreement when splitter and bend losses are taken into account.

© 2008 Optical Society of America

OCIS Codes
(130.0130) Integrated optics : Integrated optics
(230.1360) Optical devices : Beam splitters
(230.5750) Optical devices : Resonators
(250.5300) Optoelectronics : Photonic integrated circuits
(130.5460) Integrated optics : Polymer waveguides

ToC Category:
Integrated Optics

Original Manuscript: November 28, 2007
Revised Manuscript: December 25, 2007
Manuscript Accepted: January 2, 2008
Published: January 4, 2008

Nazli Rahmanian, Seunghyun Kim, Yongbin Lin, and Gregory P. Nordin, "Air-trench splitters for ultra-compact ring resonators in low refractive index contrast waveguides," Opt. Express 16, 456-465 (2008)

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