Abstract

A polarization-independent optical directional coupler based on slot waveguides is proposed and analyzed by using rigorous full-vectorial analysis methods based on a finite-element scheme. Properly choosing materials and structural parameters makes the coupling length for quasi-TE modes become equal to that for quasi-TM modes. Tolerances to operating wavelength and structural parameters are also discussed. The proposed coupler can be used for highly integrated optical circuits without polarization diversity schemes.

© 2006 Optical Society of America

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References

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2005

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[CrossRef]

M. R. Watts and H. A. Haus, Opt. Lett. 30, 138 (2005).
[CrossRef] [PubMed]

M. R. Watts, H. A. Haus, and E. P. Ippen, Opt. Lett. 30, 967 (2005).
[CrossRef] [PubMed]

T. B. Jones, M. Hochberg, C. Walker, and A. Scherer, Appl. Phys. Lett. 86, 081101 (2005).
[CrossRef]

2004

2003

2002

2001

Almeida, V. R.

Barrios, C. A.

Fujisawa, T.

Fukuda, H.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[CrossRef]

Haus, H. A.

Hochberg, M.

T. B. Jones, M. Hochberg, C. Walker, and A. Scherer, Appl. Phys. Lett. 86, 081101 (2005).
[CrossRef]

Ippen, E. P.

Itabashi, S.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[CrossRef]

Jones, T. B.

T. B. Jones, M. Hochberg, C. Walker, and A. Scherer, Appl. Phys. Lett. 86, 081101 (2005).
[CrossRef]

Koshiba, M.

Lipson, M.

Morita, H.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[CrossRef]

Panepucci, R. R.

Scherer, A.

T. B. Jones, M. Hochberg, C. Walker, and A. Scherer, Appl. Phys. Lett. 86, 081101 (2005).
[CrossRef]

Shoji, T.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[CrossRef]

Takahashi, J.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[CrossRef]

Takahashi, M.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[CrossRef]

Tamechika, E.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[CrossRef]

Tsuchizawa, T.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[CrossRef]

Walker, C.

T. B. Jones, M. Hochberg, C. Walker, and A. Scherer, Appl. Phys. Lett. 86, 081101 (2005).
[CrossRef]

Watanabe, T.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[CrossRef]

Watts, M. R.

Xu, Q.

Yamada, K.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[CrossRef]

Appl. Phys. Lett.

T. B. Jones, M. Hochberg, C. Walker, and A. Scherer, Appl. Phys. Lett. 86, 081101 (2005).
[CrossRef]

Electron. Lett.

C. A. Barrios, Electron. Lett. 40, 862 (2004).
[CrossRef]

IEEE J. Sel. Top. Quantum Electron.

T. Tsuchizawa, K. Yamada, H. Fukuda, T. Watanabe, J. Takahashi, M. Takahashi, T. Shoji, E. Tamechika, S. Itabashi, and H. Morita, IEEE J. Sel. Top. Quantum Electron. 11, 232 (2005).
[CrossRef]

J. Lightwave Technol.

Opt. Express

Opt. Lett.

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Figures (5)

Fig. 1
Fig. 1

Slot waveguide coupler.

Fig. 2
Fig. 2

(a) Coupling lengths of the slot waveguide couplers as a function of n s for d = 1.0 μ m and d = 1.5 μ m . (b), (c) Dominant electric field distributions of quasi-TE and TM modes, respectively.

Fig. 3
Fig. 3

Structural parameter conditions for achieving polarization-independent operation in slot waveguide couplers.

Fig. 4
Fig. 4

Cross talk of a slot waveguide coupler as a function of wavelength.

Fig. 5
Fig. 5

Coupling lengths of slot waveguide couplers as a function of Δ w H .

Equations (1)

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10 log ( P 1 P 2 ) ,

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