Abstract

A fiber-to-waveguide coupler is proposed to efficiently couple light from a single-mode fiber into a submicrometer semiconductor waveguide for integration with optoelectronic circuits. A microring with a specific refractive index is designed on the top of the semiconductor waveguide. The gradual vertical leakage from the microring forms steady coupling into the semiconductor waveguide. Coupling efficiency up to 93% is demonstrated using the three-dimensional finite-difference time-domain method. A tapered-waveguide or microring structure can be used to convert the lateral-mode size for coupling light into a single-mode semiconductor waveguide.

© 2007 Optical Society of America

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References

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2005 (1)

2004 (2)

Z. Lu and D. W. Prather, Opt. Lett. 29, 1748 (2004).
[CrossRef] [PubMed]

C. Choi, Y. Liu, L. Lin, L. Wang, J. Choi, D. Haas, J. Magera, and R. T. Chen, Proc. SPIE 5358, 122 (2004).
[CrossRef]

2003 (2)

2002 (3)

P. J. Reece, G. Lérondel, W. H. Zheng, and M. Gal, Appl. Phys. Lett. 81, 4895 (2002).
[CrossRef]

D. W. Prather, J. Murakowski, S. Shi, S. Venkataraman, A. Sharkawy, C. Chen, and D. Pustai, Opt. Lett. 27, 1601 (2002).
[CrossRef]

D. Taillaert, W. Bogaerts, P. Bienstman, T. F. Krauss, P. Van Daele, I. Moerman, S. Verstuyft, K. De Mesel, and R. Baets, IEEE J. Quantum Electron. 38, 949 (2002).
[CrossRef]

1973 (1)

A. Yariv, IEEE J. Quantum Electron. 9, 919 (1973).
[CrossRef]

Appl. Phys. Lett. (1)

P. J. Reece, G. Lérondel, W. H. Zheng, and M. Gal, Appl. Phys. Lett. 81, 4895 (2002).
[CrossRef]

IEEE J. Quantum Electron. (2)

A. Yariv, IEEE J. Quantum Electron. 9, 919 (1973).
[CrossRef]

D. Taillaert, W. Bogaerts, P. Bienstman, T. F. Krauss, P. Van Daele, I. Moerman, S. Verstuyft, K. De Mesel, and R. Baets, IEEE J. Quantum Electron. 38, 949 (2002).
[CrossRef]

Opt. Express (1)

Opt. Lett. (4)

Proc. SPIE (1)

C. Choi, Y. Liu, L. Lin, L. Wang, J. Choi, D. Haas, J. Magera, and R. T. Chen, Proc. SPIE 5358, 122 (2004).
[CrossRef]

Other (2)

S. Janz, B. Lamontagne, A. Delage, A. Bogdanov, D.-X. Xu, and K. P. Xu, in 2nd IEEE International Conference on Group IV Photonics (IEEE, 2005), pp. 129-131.

A. Taflove and S. C. Hagness, Computational Electrodynamics: The Finite-Difference Time-Domain Method (Artech, 2000).

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Figures (4)

Fig. 1
Fig. 1

(a) Illustration of the microring vertical coupler. (b) Illustration of the theory of operation.

Fig. 2
Fig. 2

Simulated field distribution ( H z ) for different perspectives.

Fig. 3
Fig. 3

(a) Spectrum response of the microring vertical coupler ( n ring = 3.1 ) . (b) Coupling efficiencies for the microring with different refractive indices ( λ = 1550 nm ) .

Fig. 4
Fig. 4

(a) Illustration of lateral mode size conversion. (b) Simulation of lateral mode size conversion.

Equations (2)

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P in = S x > 0 S x ( x = 0 , y , z ) d y d z ,
P cp = Guiding   layer S x ( x , y , z ) d y d z

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