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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 19 — Oct. 1, 2010
  • pp: 3243–3245

Continuously apodized fiber-to-chip surface grating coupler with refractive index engineered subwavelength structure

R. Halir, P. Cheben, J. H. Schmid, R. Ma, D. Bedard, S. Janz, D.-X. Xu, A. Densmore, J. Lapointe, and Í. Molina-Fernández  »View Author Affiliations


Optics Letters, Vol. 35, Issue 19, pp. 3243-3245 (2010)
http://dx.doi.org/10.1364/OL.35.003243


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Abstract

We demonstrate a fully etched, continuously apodized fiber-to-chip surface grating coupler for the first time (to our knowledge). The device is fabricated in a single-etch step and operates with TM-polarized light, achieving a coupling efficiency of 3.7 dB and a 3 dB bandwidth of 60 nm . A subwavelength microstructure is employed to generate an effective medium engineered to vary the strength of the grating and thereby maximize coupling efficiency, while mitigating backreflections at the same time. Minimum feature size is 100 nm for compatibility with deep-UV 193 nm lithography.

© 2010 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(130.0130) Integrated optics : Integrated optics
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

History
Original Manuscript: July 30, 2010
Manuscript Accepted: August 27, 2010
Published: September 23, 2010

Citation
R. Halir, P. Cheben, J. H. Schmid, R. Ma, D. Bedard, S. Janz, D.-X. Xu, A. Densmore, J. Lapointe, and Í. Molina-Fernández, "Continuously apodized fiber-to-chip surface grating coupler with refractive index engineered subwavelength structure," Opt. Lett. 35, 3243-3245 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-19-3243

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