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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 12 — Jun. 15, 2010
  • pp: 1989–1991

Cavity-resonator-integrated grating input/output coupler for high-efficiency vertical coupling with a small aperture

Kenji Kintaka, Yuki Kita, Katsuya Shimizu, Hitoshi Matsuoka, Shogo Ura, and Junji Nishii  »View Author Affiliations


Optics Letters, Vol. 35, Issue 12, pp. 1989-1991 (2010)
http://dx.doi.org/10.1364/OL.35.001989


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Abstract

A cavity-resonator-integrated grating input/output coupler (CRIGIC) is designed to operate at about 850 nm wavelength for high-efficiency vertical coupling of a guided wave and a free-space wave with a small aperture. The CRIGIC consists of a grating coupler and a waveguide cavity resonator constructed by two distributed Bragg reflectors. A coupling efficiency of 96% with a 3 dB bandwidth of 1.2 nm is predicted by a theoretical calculation. An output coupling efficiency of about 60% is experimentally demonstrated on a 20 μm aperture device, fabricated in a thin-film Si O 2 -based waveguide on a substrate with an Au reflection layer, for what we believe to be the first time.

© 2010 Optical Society of America

OCIS Codes
(130.0130) Integrated optics : Integrated optics
(130.3120) Integrated optics : Integrated optics devices
(230.1950) Optical devices : Diffraction gratings
(230.3120) Optical devices : Integrated optics devices
(230.7370) Optical devices : Waveguides

ToC Category:
Integrated Optics

History
Original Manuscript: March 23, 2010
Revised Manuscript: May 14, 2010
Manuscript Accepted: May 21, 2010
Published: June 7, 2010

Citation
Kenji Kintaka, Yuki Kita, Katsuya Shimizu, Hitoshi Matsuoka, Shogo Ura, and Junji Nishii, "Cavity-resonator-integrated grating input/output coupler for high-efficiency vertical coupling with a small aperture," Opt. Lett. 35, 1989-1991 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-12-1989

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