OSA's Digital Library

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, Q. Fang, M. B. Yu, G. Q. Lo, and D. L. Kwong  »View Author Affiliations

Optics Express, Vol. 16, Issue 25, pp. 20803-20808 (2008)

View Full Text Article

Enhanced HTML    Acrobat PDF (1290 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



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

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

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)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. D. Taillaert, W. Bogaerts, P. Bienstman, T. F. Krauss, P. V. Daele, I. Moerman, S. Verstuyft, K. D. Mesel, and R. Baets, "An out-of-plane grating coupler for efficient butt-coupling between compact planar waveguides and single-mode fibers," IEEE J. Quantum Electron. 38, 949-955 (2002). [CrossRef]
  2. B. Wang, J. Jiang, and G. Nordin, "Compact slanted grating couplers," Opt. Express 12, 3313-3326 (2004) http://www.opticsinfobase.org/abstract.cfm?URI=oe-12-15-3313 [CrossRef] [PubMed]
  3. G. Masanovic, G. Reed, W. Headley, B. Timotijevic, V. Passaro, R. Atta, G. Ensell, and A. Evans, "A high efficiency input/output coupler for small silicon photonic devices," Opt. Express 13, 7374-7379 (2005) http://www.opticsinfobase.org/abstract.cfm?URI=oe-13-19-7374 [CrossRef] [PubMed]
  4. Z. Lu, "Efficient fiber-to-waveguide coupling through the vertical leakage from a microring," Opt. Lett. 32, 2861-2863 (2007). [CrossRef] [PubMed]
  5. T. Dillon, J. Murakowski, S. Shi, and D. Prather, "Fiber-to-waveguide coupler based on the parabolic reflector," Opt. Lett. 33, 896-898 (2008). [CrossRef] [PubMed]
  6. H. Li, Z. Cao, H. Lu, and Q. Shen, "Free-space coupling of a light beam into a symmetrical metal-cladding optical waveguide," Appl. Phys. Lett. 83, 2757 (2003). [CrossRef]
  7. Z. Lu and D. W. Prather, "Total internal reflection-evanescent coupler for fiber-to-waveguide integration of planar optoelectric devices," Opt. Lett. 29, 1748-1750 (2004). [CrossRef] [PubMed]
  8. A. Sure, T. Dillon, J. Murakowski, C. Lin, D. Pustai, and D. Prather, "Fabrication and characterization of three-dimensional silicon tapers," Opt. Express 11, 3555-3561 (2003) http://www.opticsinfobase.org/abstract.cfm?URI=oe-11-26-3555 [CrossRef] [PubMed]
  9. T. Shoji, T. Tsuchizawa, T. Watanabe, K. Yamada, and H. Morita, "Low loss mode size converter from 0.3 μm square Si wire waveguides to single mode fibres," Electron. Lett. 38, 1669-1670 (2002). [CrossRef]
  10. V. R. Almelda, R. R. Panepuccl, and M. Lipson, "Nanotaper for compact mode conversion," Opt. Lett. 28, 1302-1304 (2003). [CrossRef]
  11. V. Nguyen, T. Montalbo, C. Manolatou, A. Agarwal, C. Y. Hong, J. Yasaitis, L. C. Kimerling, and J. Michel, "Silicon-based highly-efficient fiber-to-waveguide coupler for high index contrast systems," Appl. Phys. Lett. 88, 081112 (2006). [CrossRef]
  12. K. Shiraishi, H. Yoda, A. Ohshima, H. Ikedo, and C. S. Tsai, "A silicon-based spot-size converter between single-mode fibers and Si-wire waveguides using cascaded tapers," Appl. Phys. Lett. 91, 141120 (2007). [CrossRef]
  13. B. Luyssaert, P. Vandersteegen, D. Taillaert, P. Dumon, W. Bogaerts, P. Bienstman, D. V. Thourhout, V. Wiaux, S. Beckx, and R. Baets, "A compact photonic horizontal spot-size converter realized in silicon-on-insulator," IEEE Photon. Technol. Lett. 17, 73-75 (2005). [CrossRef]
  14. J. H. Schmid, B. Lamontagne, P. Cheben, A. Delâge, S. Janz, A. Densmore, J. Lapointe, E. Post, P. Waldron, and D.-X. Xu, "Mode Converters for Coupling to High Aspect Ratio Silicon-on-Insulator Channel waveguides," IEEE Photon. Technol. Lett. 19, 855-857 (2007). [CrossRef]
  15. G. Roelkens, P. Dumon, W. Bogaerts, D. Van Thourhout, and R. Baets, "Efficient silicon-on-insulator fiber coupler fabricated using 248-nm-deep UV lithography," IEEE Photon. Technol. Lett. 17, 2613-1615 (2005). [CrossRef]
  16. M. Lipson, and D. Almedia, "High-Index Contrast Distributed Bragg Reflector," Patent WO 03/062883 A2 (2003).
  17. Y. Liu and J. Yu, "Low-loss coupler between fiber and waveguide based on silicon-on-insulator slot waveguides," Appl. Opt. 46, 7858-7861 (2007). [CrossRef] [PubMed]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited