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Applied Optics

Applied Optics


  • Vol. 44, Iss. 24 — Aug. 22, 2005
  • pp: 5036–5041

Compact silicon-on-insulator-based multimode interference coupler with bilevel taper structure

Daoxin Dai, Jian-Jun He, and Sailing He  »View Author Affiliations

Applied Optics, Vol. 44, Issue 24, pp. 5036-5041 (2005)

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A novel compact silicon-on-insulator- (SOI-)based multimode interference (MMI) coupler with bilevel taper structures was designed. The MMI section and the S-bend sections of the input–output waveguides are deeply etched. The input–output waveguides connecting to single-mode fibers or other photonic light circuits are etched shallowly to yield single-mode operation. A bilevel taper is introduced in the transition region between the shallowly and deeply etched regions. It is predicted theoretically that this design will not only improve the quality of the self-imaging in the MMI section but will also make the structure compact. Both the excess loss and the nonuniformity of the MMI coupler are reduced. By use of a three-dimensional beam propagation method, the performance of a 1 × 4 MMI coupler based on a SOI is simulated as a numerical example of the novel design. The simulated nonuniformity and the excess loss are approximately 0.0285 and 0.2 dB, respectively.

© 2005 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(130.3120) Integrated optics : Integrated optics devices

Original Manuscript: October 18, 2004
Revised Manuscript: March 30, 2005
Manuscript Accepted: March 31, 2005
Published: August 20, 2005

Daoxin Dai, Jian-Jun He, and Sailing He, "Compact silicon-on-insulator-based multimode interference coupler with bilevel taper structure," Appl. Opt. 44, 5036-5041 (2005)

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  1. C. Chaudhari, D. S. Patil, D. K. Gautam, “A new technique for the reduction of the power loss in the Y-branch optical power splitter,” Opt. Commun. 193, 121–125 (2001). [CrossRef]
  2. K. Kishioka, “A design method to achieve wide wavelength-flattened responses in the directional coupler-type optical power splitters,” J. Lightwave Technol. 19, 1705–1715 (2001). [CrossRef]
  3. C. Dragone, C. H. Henry, I. P. Kaminow, R. C. Kistler, “Efficient multichannel integrated optics star coupler on silicon,” IEEE Photon. Technol. Lett. 1, 241–243 (1999). [CrossRef]
  4. L. B. Soldano, E. C. M. Pennings, “Optical multi-mode interference devices based on self-imaging: principles and applications,” J. Lightwave Technol. 13, 615–627 (1995). [CrossRef]
  5. M. L. Mašanović, E. J. Skogen, J. S. Barton, J. M. Sullivan, D. J. Blumenthal, L. A. Coldren, “Multimode interference-based two-stage 1 × 2 light splitter for compact photonic integrated circuits,” IEEE Photon. Technol. Lett. 15, 706–708 (2003). [CrossRef]
  6. U. Fischer, T. Zinke, J.-R. Kropp, F. Arndt, K. Petermann, “0.1 dB/cm waveguide losses in single-mode SOI rib waveguides,” IEEE Photon. Technol. Lett. 8, 647–648 (1996). [CrossRef]
  7. S. L. Tsao, P. C. Peng, “Design of two-dimensional 1 × 16 and 1 × 32 array waveguide optical power splitters,” in Optoelectronic Materials and Devices II, Y.-K. Su, P. Bhattacharya, eds., Proc. SPIE4078, 373–382 (2000). [CrossRef]
  8. H. Wei, J. Yu, Z. Liu, X. Zhang, W. Shi, C. Fang, “Fabrication of 4 × 4 tapered MMI coupler with large cross section,” IEEE Photon. Technol. Lett. 13, 466–468 (2001). [CrossRef]
  9. P. D. Trinh, S. Yegnanarayanan, F. Coppinger, B. Jalali, “Silicon-on-insulator (SOI) phased-array wavelength multi/multiplexer with extremely low-polarization sensitivity,” IEEE Photon. Technol. Lett. 9, 940–942 (1997). [CrossRef]
  10. M. Rajarajan, B. M. Azizur Rahman, T. Wongcharoen, K. T. V. Grattan, “Accurate analysis of MMI devices with two dimensional confinement,” J. Lightwave Technol. 14, 1078–2084 (1996). [CrossRef]
  11. S. He, X. Ao, V. Romanov, “General properties of N× M self-images in a strongly confined rectangular waveguide,” Appl. Opt. 42, 4855–4859 (2003). [CrossRef] [PubMed]
  12. S. Lvescan, A. Vonsovici, “The single-mode condition for semiconductor rib waveguides with large cross section,” J. Lightwave Technol. 16, 1851–1853 (1998). [CrossRef]
  13. F. Xia, J. K. Thomson, M. R. Gokhale, P. V. Studenkov, J. Wei, W. Lin, S. R. Forrest, “An asymmetric twin-waveguide high-bandwidth photodiode using a lateral taper coupler,” IEEE Photon. Technol. Lett. 13, 845–847 (2001). [CrossRef]
  14. M. Popović, K. Wada, S. Akiyama, H. A. Haus, J. Michel, “Air trenches for sharp silica waveguide bends,” J. Lightwave Technol. 20, 1762–1771 (2002). [CrossRef]
  15. J. Yamuchi, J. Shibayama, O. Saito, O. Uchiyama, H. Nakano, “Improved finite difference beam-propagation method based on the generalized Douglas scheme and its application to semivectorial analysis,” J. Lightwave Technol. 14, 2401–2406 (1996). [CrossRef]
  16. R. M. Lorenzo, C. Llorente, E. J. Abril, M. Lopéz, “Improved self-imaging characteristics in 1 × N multimode couplers,” IEE Proc. Optoelectron. 145, 65–69 (1998). [CrossRef]
  17. R. Yin, J. Yang, X. Jiang, J. Li, M. Wang, “Improved approach to low-loss and high-uniformity MMI devices,” Opt. Commun. 181, 317–321 (2000). [CrossRef]
  18. Q. Wang, J. Lu, S. He, “Optimal design of a multimode interference coupler using a genetic algorithm,” Opt. Commun. 209, 131–136 (2002). [CrossRef]

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