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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 25 — Dec. 8, 2008
  • pp: 20803–20808

Improving coupling efficiency of fiber-waveguide coupling with a double-tip coupler

S. H. Tao, Junfeng Song, Qing Fang, Mingbin Yu, Guoqiang Lo, and Dimlee Kwong  »View Author Affiliations


Optics Express, Vol. 16, Issue 25, pp. 20803-20808 (2008)
http://dx.doi.org/10.1364/OE.16.020803


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Abstract

A double-tip coupler that comprises two inversely and laterally tapered waveguides is experimentally demonstrated for efficient light coupling between a fiber and a sub-micron silicon nitride waveguide. The coupling efficiency of the fabricated double-tip coupler can be improved by as much as over 2 dB per coupling facet, compared with that of a single-tip one with the same tip width of 180 nm. The effect of the gap width of the double tips on the coupling efficiency is studied both in experiment and simulation.

© 2008 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.2300) Fiber optics and optical communications : Fiber measurements
(220.0220) Optical design and fabrication : Optical design and fabrication

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: July 11, 2008
Revised Manuscript: September 9, 2008
Manuscript Accepted: September 12, 2008
Published: December 2, 2008

Citation
S. H. Tao, Junfeng Song, Qing Fang, Mingbin Yu, Guoqiang Lo, and Dimlee Kwong, "Improving coupling efficiency of fiber-waveguide coupling with a double-tip coupler," Opt. Express 16, 20803-20808 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-25-20803


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