Abstract

A silicon-on-insulator-based adiabatic waveguide taper with a high coupling efficiency and small footprint is presented. The taper was designed to reduce the incidence of mode conversion to higher-order and radiation modes inside the waveguide. In connecting a 0.5-μm-wide output waveguide and a 12-μm-wide input waveguide of a grating coupler, a compact 120-μm-long taper was demonstrated, achieving a transmission of 98.3%. Previously, this transmission level could only be achieved using a conventional linear taper with a length of more than 300 μm.

© 2014 Chinese Laser Press

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  1. R. Soref, “The past, present, and future of silicon photonics,” IEEE J. Sel. Top. Quantum Electron. 12, 1678–1687 (2006).
    [CrossRef]
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    [CrossRef]
  3. H. F. Zhou, J. F. Song, C. Li, H. J. Zhang, and P. G. Lo, “A library of ultra-compact multimode interference optical couplers on SOI,” IEEE Photon. Technol. Lett. 25, 1149–1152 (2013).
    [CrossRef]
  4. D. Taillaert, F. V. Laere, M. Ayre, W. Bogaerts, D. V. Thourhout, P. Bienstman, and R. Baets, “Grating coupler for coupling between optical fibers and nanophotonic waveguides,” Jpn. J. Appl. Phys. 45, 6071–6077 (2006).
    [CrossRef]
  5. L. He, Y. He, A. Pomerene, C. Hill, S. Ocheltree, T. Baehr-Jones, and M. Hochberg, “Ultrathin silicon-on-insulator grating couplers,” IEEE Photon. Technol. Lett. 24, 2247–2249 (2012).
    [CrossRef]
  6. C. H. Chen and C. H. Chiu, “Taper-integrated multimode-interference based waveguide crossing design,” IEEE J. Quantum Electron. 46, 1656–1661 (2010).
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
  15. B. Luyssaert, P. Vandersteegen, W. Bogaerts, P. Dumon, P. Sanchis, J. Marti, and R. Baets, “A versatile optical spot-size converter design,” in Proceedings of European Conference on Optical Communication. (Stockholm, 2004), pp. 468–469.
  16. K. Van Acoleyen and R. Baets, “Compact lens-assisted focusing tapers fabricated on silicon-on-insulator,” in Proceedings of IEEE Conference on Group IV Photonics (IEEE, 2011), pp. 157–159.
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2013 (2)

S. Pathak, D. V. Thourhout, and W. Bogaerts, “Design trade-offs for silicon-on-insulator-based AWGs for (de)multiplexer applications,” Opt. Lett. 38, 2961–2964 (2013).
[CrossRef]

H. F. Zhou, J. F. Song, C. Li, H. J. Zhang, and P. G. Lo, “A library of ultra-compact multimode interference optical couplers on SOI,” IEEE Photon. Technol. Lett. 25, 1149–1152 (2013).
[CrossRef]

2012 (1)

L. He, Y. He, A. Pomerene, C. Hill, S. Ocheltree, T. Baehr-Jones, and M. Hochberg, “Ultrathin silicon-on-insulator grating couplers,” IEEE Photon. Technol. Lett. 24, 2247–2249 (2012).
[CrossRef]

2010 (1)

C. H. Chen and C. H. Chiu, “Taper-integrated multimode-interference based waveguide crossing design,” IEEE J. Quantum Electron. 46, 1656–1661 (2010).

2007 (1)

2006 (3)

R. Soref, “The past, present, and future of silicon photonics,” IEEE J. Sel. Top. Quantum Electron. 12, 1678–1687 (2006).
[CrossRef]

J. J. Wu, B. R. Shi, and M. Kong, “Exponentially tapered multi-mode interference couplers,” Chin. Opt. Lett. 4, 167–169 (2006).

D. Taillaert, F. V. Laere, M. Ayre, W. Bogaerts, D. V. Thourhout, P. Bienstman, and R. Baets, “Grating coupler for coupling between optical fibers and nanophotonic waveguides,” Jpn. J. Appl. Phys. 45, 6071–6077 (2006).
[CrossRef]

2005 (1)

2003 (1)

1998 (1)

1977 (2)

W. K. Burns, A. F. Milton, and A. B. Lee, “Optical waveguide parabolic coupling horns,” Appl. Phys. Lett. 30, 28–30 (1977).
[CrossRef]

A. F. Milton and W. K. Burns, “Mode coupling in optical waveguide horns,” IEEE J. Quantum Electron. QE-13, 828–835 (1977).
[CrossRef]

1975 (1)

Almeida, V. R.

Ayre, M.

D. Taillaert, F. V. Laere, M. Ayre, W. Bogaerts, D. V. Thourhout, P. Bienstman, and R. Baets, “Grating coupler for coupling between optical fibers and nanophotonic waveguides,” Jpn. J. Appl. Phys. 45, 6071–6077 (2006).
[CrossRef]

Baehr-Jones, T.

L. He, Y. He, A. Pomerene, C. Hill, S. Ocheltree, T. Baehr-Jones, and M. Hochberg, “Ultrathin silicon-on-insulator grating couplers,” IEEE Photon. Technol. Lett. 24, 2247–2249 (2012).
[CrossRef]

Baets, R.

W. Bogaerts, P. Dumon, D. V. Thourhout, and R. Baets, “Low-loss, low-cross-talk crossings for silicon-on-insulator nanophotonic waveguides,” Opt. Lett. 32, 2801–2803 (2007).
[CrossRef]

D. Taillaert, F. V. Laere, M. Ayre, W. Bogaerts, D. V. Thourhout, P. Bienstman, and R. Baets, “Grating coupler for coupling between optical fibers and nanophotonic waveguides,” Jpn. J. Appl. Phys. 45, 6071–6077 (2006).
[CrossRef]

B. Luyssaert, P. Bienstman, P. Vandersteegen, P. Dumon, and R. Baets, “Efficient nonadiabatic planar waveguide tapers,” J. Lightwave Technol. 23, 2462–2468 (2005).
[CrossRef]

B. Luyssaert, P. Vandersteegen, W. Bogaerts, P. Dumon, P. Sanchis, J. Marti, and R. Baets, “A versatile optical spot-size converter design,” in Proceedings of European Conference on Optical Communication. (Stockholm, 2004), pp. 468–469.

K. Van Acoleyen and R. Baets, “Compact lens-assisted focusing tapers fabricated on silicon-on-insulator,” in Proceedings of IEEE Conference on Group IV Photonics (IEEE, 2011), pp. 157–159.

D. Vermeulen, K. Van Acoleyen, S. Ghosh, S. Selvaraja, W. A. D. de Cort, N. A. Yebo, E. Hallynck, K. de Vos, P. P. P. Debackere, P. Dumon, G. Roelkens, D. Van Thourhout, and R. Baets, “Efficient tapering to the fundamental quasi-TM mode in asymmetrical waveguides,” in Proceedings of European Conference on Integrated Optics, Cambridge, 2010, paper WeP16.

Bienstman, P.

D. Taillaert, F. V. Laere, M. Ayre, W. Bogaerts, D. V. Thourhout, P. Bienstman, and R. Baets, “Grating coupler for coupling between optical fibers and nanophotonic waveguides,” Jpn. J. Appl. Phys. 45, 6071–6077 (2006).
[CrossRef]

B. Luyssaert, P. Bienstman, P. Vandersteegen, P. Dumon, and R. Baets, “Efficient nonadiabatic planar waveguide tapers,” J. Lightwave Technol. 23, 2462–2468 (2005).
[CrossRef]

Bogaerts, W.

S. Pathak, D. V. Thourhout, and W. Bogaerts, “Design trade-offs for silicon-on-insulator-based AWGs for (de)multiplexer applications,” Opt. Lett. 38, 2961–2964 (2013).
[CrossRef]

W. Bogaerts, P. Dumon, D. V. Thourhout, and R. Baets, “Low-loss, low-cross-talk crossings for silicon-on-insulator nanophotonic waveguides,” Opt. Lett. 32, 2801–2803 (2007).
[CrossRef]

D. Taillaert, F. V. Laere, M. Ayre, W. Bogaerts, D. V. Thourhout, P. Bienstman, and R. Baets, “Grating coupler for coupling between optical fibers and nanophotonic waveguides,” Jpn. J. Appl. Phys. 45, 6071–6077 (2006).
[CrossRef]

B. Luyssaert, P. Vandersteegen, W. Bogaerts, P. Dumon, P. Sanchis, J. Marti, and R. Baets, “A versatile optical spot-size converter design,” in Proceedings of European Conference on Optical Communication. (Stockholm, 2004), pp. 468–469.

Bona, G. L.

Burns, W. K.

A. F. Milton and W. K. Burns, “Mode coupling in optical waveguide horns,” IEEE J. Quantum Electron. QE-13, 828–835 (1977).
[CrossRef]

W. K. Burns, A. F. Milton, and A. B. Lee, “Optical waveguide parabolic coupling horns,” Appl. Phys. Lett. 30, 28–30 (1977).
[CrossRef]

Chen, C. H.

C. H. Chen and C. H. Chiu, “Taper-integrated multimode-interference based waveguide crossing design,” IEEE J. Quantum Electron. 46, 1656–1661 (2010).

Chiu, C. H.

C. H. Chen and C. H. Chiu, “Taper-integrated multimode-interference based waveguide crossing design,” IEEE J. Quantum Electron. 46, 1656–1661 (2010).

de Cort, W. A. D.

D. Vermeulen, K. Van Acoleyen, S. Ghosh, S. Selvaraja, W. A. D. de Cort, N. A. Yebo, E. Hallynck, K. de Vos, P. P. P. Debackere, P. Dumon, G. Roelkens, D. Van Thourhout, and R. Baets, “Efficient tapering to the fundamental quasi-TM mode in asymmetrical waveguides,” in Proceedings of European Conference on Integrated Optics, Cambridge, 2010, paper WeP16.

de Vos, K.

D. Vermeulen, K. Van Acoleyen, S. Ghosh, S. Selvaraja, W. A. D. de Cort, N. A. Yebo, E. Hallynck, K. de Vos, P. P. P. Debackere, P. Dumon, G. Roelkens, D. Van Thourhout, and R. Baets, “Efficient tapering to the fundamental quasi-TM mode in asymmetrical waveguides,” in Proceedings of European Conference on Integrated Optics, Cambridge, 2010, paper WeP16.

Debackere, P. P. P.

D. Vermeulen, K. Van Acoleyen, S. Ghosh, S. Selvaraja, W. A. D. de Cort, N. A. Yebo, E. Hallynck, K. de Vos, P. P. P. Debackere, P. Dumon, G. Roelkens, D. Van Thourhout, and R. Baets, “Efficient tapering to the fundamental quasi-TM mode in asymmetrical waveguides,” in Proceedings of European Conference on Integrated Optics, Cambridge, 2010, paper WeP16.

Dumon, P.

W. Bogaerts, P. Dumon, D. V. Thourhout, and R. Baets, “Low-loss, low-cross-talk crossings for silicon-on-insulator nanophotonic waveguides,” Opt. Lett. 32, 2801–2803 (2007).
[CrossRef]

B. Luyssaert, P. Bienstman, P. Vandersteegen, P. Dumon, and R. Baets, “Efficient nonadiabatic planar waveguide tapers,” J. Lightwave Technol. 23, 2462–2468 (2005).
[CrossRef]

D. Vermeulen, K. Van Acoleyen, S. Ghosh, S. Selvaraja, W. A. D. de Cort, N. A. Yebo, E. Hallynck, K. de Vos, P. P. P. Debackere, P. Dumon, G. Roelkens, D. Van Thourhout, and R. Baets, “Efficient tapering to the fundamental quasi-TM mode in asymmetrical waveguides,” in Proceedings of European Conference on Integrated Optics, Cambridge, 2010, paper WeP16.

B. Luyssaert, P. Vandersteegen, W. Bogaerts, P. Dumon, P. Sanchis, J. Marti, and R. Baets, “A versatile optical spot-size converter design,” in Proceedings of European Conference on Optical Communication. (Stockholm, 2004), pp. 468–469.

Erni, D.

Germann, R.

Ghosh, S.

D. Vermeulen, K. Van Acoleyen, S. Ghosh, S. Selvaraja, W. A. D. de Cort, N. A. Yebo, E. Hallynck, K. de Vos, P. P. P. Debackere, P. Dumon, G. Roelkens, D. Van Thourhout, and R. Baets, “Efficient tapering to the fundamental quasi-TM mode in asymmetrical waveguides,” in Proceedings of European Conference on Integrated Optics, Cambridge, 2010, paper WeP16.

Hallynck, E.

D. Vermeulen, K. Van Acoleyen, S. Ghosh, S. Selvaraja, W. A. D. de Cort, N. A. Yebo, E. Hallynck, K. de Vos, P. P. P. Debackere, P. Dumon, G. Roelkens, D. Van Thourhout, and R. Baets, “Efficient tapering to the fundamental quasi-TM mode in asymmetrical waveguides,” in Proceedings of European Conference on Integrated Optics, Cambridge, 2010, paper WeP16.

He, L.

L. He, Y. He, A. Pomerene, C. Hill, S. Ocheltree, T. Baehr-Jones, and M. Hochberg, “Ultrathin silicon-on-insulator grating couplers,” IEEE Photon. Technol. Lett. 24, 2247–2249 (2012).
[CrossRef]

He, Y.

L. He, Y. He, A. Pomerene, C. Hill, S. Ocheltree, T. Baehr-Jones, and M. Hochberg, “Ultrathin silicon-on-insulator grating couplers,” IEEE Photon. Technol. Lett. 24, 2247–2249 (2012).
[CrossRef]

Hill, C.

L. He, Y. He, A. Pomerene, C. Hill, S. Ocheltree, T. Baehr-Jones, and M. Hochberg, “Ultrathin silicon-on-insulator grating couplers,” IEEE Photon. Technol. Lett. 24, 2247–2249 (2012).
[CrossRef]

Hochberg, M.

L. He, Y. He, A. Pomerene, C. Hill, S. Ocheltree, T. Baehr-Jones, and M. Hochberg, “Ultrathin silicon-on-insulator grating couplers,” IEEE Photon. Technol. Lett. 24, 2247–2249 (2012).
[CrossRef]

Kong, M.

Laere, F. V.

D. Taillaert, F. V. Laere, M. Ayre, W. Bogaerts, D. V. Thourhout, P. Bienstman, and R. Baets, “Grating coupler for coupling between optical fibers and nanophotonic waveguides,” Jpn. J. Appl. Phys. 45, 6071–6077 (2006).
[CrossRef]

Lee, A. B.

W. K. Burns, A. F. Milton, and A. B. Lee, “Optical waveguide parabolic coupling horns,” Appl. Phys. Lett. 30, 28–30 (1977).
[CrossRef]

Li, C.

H. F. Zhou, J. F. Song, C. Li, H. J. Zhang, and P. G. Lo, “A library of ultra-compact multimode interference optical couplers on SOI,” IEEE Photon. Technol. Lett. 25, 1149–1152 (2013).
[CrossRef]

Lipson, M.

Lo, P. G.

H. F. Zhou, J. F. Song, C. Li, H. J. Zhang, and P. G. Lo, “A library of ultra-compact multimode interference optical couplers on SOI,” IEEE Photon. Technol. Lett. 25, 1149–1152 (2013).
[CrossRef]

Luyssaert, B.

B. Luyssaert, P. Bienstman, P. Vandersteegen, P. Dumon, and R. Baets, “Efficient nonadiabatic planar waveguide tapers,” J. Lightwave Technol. 23, 2462–2468 (2005).
[CrossRef]

B. Luyssaert, P. Vandersteegen, W. Bogaerts, P. Dumon, P. Sanchis, J. Marti, and R. Baets, “A versatile optical spot-size converter design,” in Proceedings of European Conference on Optical Communication. (Stockholm, 2004), pp. 468–469.

Marti, J.

B. Luyssaert, P. Vandersteegen, W. Bogaerts, P. Dumon, P. Sanchis, J. Marti, and R. Baets, “A versatile optical spot-size converter design,” in Proceedings of European Conference on Optical Communication. (Stockholm, 2004), pp. 468–469.

Massarek, I.

Milton, A. F.

A. F. Milton and W. K. Burns, “Mode coupling in optical waveguide horns,” IEEE J. Quantum Electron. QE-13, 828–835 (1977).
[CrossRef]

W. K. Burns, A. F. Milton, and A. B. Lee, “Optical waveguide parabolic coupling horns,” Appl. Phys. Lett. 30, 28–30 (1977).
[CrossRef]

Nelson, A. R.

Ocheltree, S.

L. He, Y. He, A. Pomerene, C. Hill, S. Ocheltree, T. Baehr-Jones, and M. Hochberg, “Ultrathin silicon-on-insulator grating couplers,” IEEE Photon. Technol. Lett. 24, 2247–2249 (2012).
[CrossRef]

Offrein, B. J.

Panepucci, R. R.

Pathak, S.

Pomerene, A.

L. He, Y. He, A. Pomerene, C. Hill, S. Ocheltree, T. Baehr-Jones, and M. Hochberg, “Ultrathin silicon-on-insulator grating couplers,” IEEE Photon. Technol. Lett. 24, 2247–2249 (2012).
[CrossRef]

Roelkens, G.

D. Vermeulen, K. Van Acoleyen, S. Ghosh, S. Selvaraja, W. A. D. de Cort, N. A. Yebo, E. Hallynck, K. de Vos, P. P. P. Debackere, P. Dumon, G. Roelkens, D. Van Thourhout, and R. Baets, “Efficient tapering to the fundamental quasi-TM mode in asymmetrical waveguides,” in Proceedings of European Conference on Integrated Optics, Cambridge, 2010, paper WeP16.

Sanchis, P.

B. Luyssaert, P. Vandersteegen, W. Bogaerts, P. Dumon, P. Sanchis, J. Marti, and R. Baets, “A versatile optical spot-size converter design,” in Proceedings of European Conference on Optical Communication. (Stockholm, 2004), pp. 468–469.

Selvaraja, S.

D. Vermeulen, K. Van Acoleyen, S. Ghosh, S. Selvaraja, W. A. D. de Cort, N. A. Yebo, E. Hallynck, K. de Vos, P. P. P. Debackere, P. Dumon, G. Roelkens, D. Van Thourhout, and R. Baets, “Efficient tapering to the fundamental quasi-TM mode in asymmetrical waveguides,” in Proceedings of European Conference on Integrated Optics, Cambridge, 2010, paper WeP16.

Shi, B. R.

Song, J. F.

H. F. Zhou, J. F. Song, C. Li, H. J. Zhang, and P. G. Lo, “A library of ultra-compact multimode interference optical couplers on SOI,” IEEE Photon. Technol. Lett. 25, 1149–1152 (2013).
[CrossRef]

Soref, R.

R. Soref, “The past, present, and future of silicon photonics,” IEEE J. Sel. Top. Quantum Electron. 12, 1678–1687 (2006).
[CrossRef]

Spühler, M. M.

Taillaert, D.

D. Taillaert, F. V. Laere, M. Ayre, W. Bogaerts, D. V. Thourhout, P. Bienstman, and R. Baets, “Grating coupler for coupling between optical fibers and nanophotonic waveguides,” Jpn. J. Appl. Phys. 45, 6071–6077 (2006).
[CrossRef]

Thourhout, D. V.

Van Acoleyen, K.

D. Vermeulen, K. Van Acoleyen, S. Ghosh, S. Selvaraja, W. A. D. de Cort, N. A. Yebo, E. Hallynck, K. de Vos, P. P. P. Debackere, P. Dumon, G. Roelkens, D. Van Thourhout, and R. Baets, “Efficient tapering to the fundamental quasi-TM mode in asymmetrical waveguides,” in Proceedings of European Conference on Integrated Optics, Cambridge, 2010, paper WeP16.

K. Van Acoleyen and R. Baets, “Compact lens-assisted focusing tapers fabricated on silicon-on-insulator,” in Proceedings of IEEE Conference on Group IV Photonics (IEEE, 2011), pp. 157–159.

Van Thourhout, D.

D. Vermeulen, K. Van Acoleyen, S. Ghosh, S. Selvaraja, W. A. D. de Cort, N. A. Yebo, E. Hallynck, K. de Vos, P. P. P. Debackere, P. Dumon, G. Roelkens, D. Van Thourhout, and R. Baets, “Efficient tapering to the fundamental quasi-TM mode in asymmetrical waveguides,” in Proceedings of European Conference on Integrated Optics, Cambridge, 2010, paper WeP16.

Vandersteegen, P.

B. Luyssaert, P. Bienstman, P. Vandersteegen, P. Dumon, and R. Baets, “Efficient nonadiabatic planar waveguide tapers,” J. Lightwave Technol. 23, 2462–2468 (2005).
[CrossRef]

B. Luyssaert, P. Vandersteegen, W. Bogaerts, P. Dumon, P. Sanchis, J. Marti, and R. Baets, “A versatile optical spot-size converter design,” in Proceedings of European Conference on Optical Communication. (Stockholm, 2004), pp. 468–469.

Vermeulen, D.

D. Vermeulen, K. Van Acoleyen, S. Ghosh, S. Selvaraja, W. A. D. de Cort, N. A. Yebo, E. Hallynck, K. de Vos, P. P. P. Debackere, P. Dumon, G. Roelkens, D. Van Thourhout, and R. Baets, “Efficient tapering to the fundamental quasi-TM mode in asymmetrical waveguides,” in Proceedings of European Conference on Integrated Optics, Cambridge, 2010, paper WeP16.

Wu, J. J.

Yebo, N. A.

D. Vermeulen, K. Van Acoleyen, S. Ghosh, S. Selvaraja, W. A. D. de Cort, N. A. Yebo, E. Hallynck, K. de Vos, P. P. P. Debackere, P. Dumon, G. Roelkens, D. Van Thourhout, and R. Baets, “Efficient tapering to the fundamental quasi-TM mode in asymmetrical waveguides,” in Proceedings of European Conference on Integrated Optics, Cambridge, 2010, paper WeP16.

Zhang, H. J.

H. F. Zhou, J. F. Song, C. Li, H. J. Zhang, and P. G. Lo, “A library of ultra-compact multimode interference optical couplers on SOI,” IEEE Photon. Technol. Lett. 25, 1149–1152 (2013).
[CrossRef]

Zhou, H. F.

H. F. Zhou, J. F. Song, C. Li, H. J. Zhang, and P. G. Lo, “A library of ultra-compact multimode interference optical couplers on SOI,” IEEE Photon. Technol. Lett. 25, 1149–1152 (2013).
[CrossRef]

Appl. Opt. (1)

Appl. Phys. Lett. (1)

W. K. Burns, A. F. Milton, and A. B. Lee, “Optical waveguide parabolic coupling horns,” Appl. Phys. Lett. 30, 28–30 (1977).
[CrossRef]

Chin. Opt. Lett. (1)

IEEE J. Quantum Electron. (2)

A. F. Milton and W. K. Burns, “Mode coupling in optical waveguide horns,” IEEE J. Quantum Electron. QE-13, 828–835 (1977).
[CrossRef]

C. H. Chen and C. H. Chiu, “Taper-integrated multimode-interference based waveguide crossing design,” IEEE J. Quantum Electron. 46, 1656–1661 (2010).

IEEE J. Sel. Top. Quantum Electron. (1)

R. Soref, “The past, present, and future of silicon photonics,” IEEE J. Sel. Top. Quantum Electron. 12, 1678–1687 (2006).
[CrossRef]

IEEE Photon. Technol. Lett. (2)

H. F. Zhou, J. F. Song, C. Li, H. J. Zhang, and P. G. Lo, “A library of ultra-compact multimode interference optical couplers on SOI,” IEEE Photon. Technol. Lett. 25, 1149–1152 (2013).
[CrossRef]

L. He, Y. He, A. Pomerene, C. Hill, S. Ocheltree, T. Baehr-Jones, and M. Hochberg, “Ultrathin silicon-on-insulator grating couplers,” IEEE Photon. Technol. Lett. 24, 2247–2249 (2012).
[CrossRef]

J. Lightwave Technol. (2)

Jpn. J. Appl. Phys. (1)

D. Taillaert, F. V. Laere, M. Ayre, W. Bogaerts, D. V. Thourhout, P. Bienstman, and R. Baets, “Grating coupler for coupling between optical fibers and nanophotonic waveguides,” Jpn. J. Appl. Phys. 45, 6071–6077 (2006).
[CrossRef]

Opt. Lett. (3)

Other (3)

B. Luyssaert, P. Vandersteegen, W. Bogaerts, P. Dumon, P. Sanchis, J. Marti, and R. Baets, “A versatile optical spot-size converter design,” in Proceedings of European Conference on Optical Communication. (Stockholm, 2004), pp. 468–469.

K. Van Acoleyen and R. Baets, “Compact lens-assisted focusing tapers fabricated on silicon-on-insulator,” in Proceedings of IEEE Conference on Group IV Photonics (IEEE, 2011), pp. 157–159.

D. Vermeulen, K. Van Acoleyen, S. Ghosh, S. Selvaraja, W. A. D. de Cort, N. A. Yebo, E. Hallynck, K. de Vos, P. P. P. Debackere, P. Dumon, G. Roelkens, D. Van Thourhout, and R. Baets, “Efficient tapering to the fundamental quasi-TM mode in asymmetrical waveguides,” in Proceedings of European Conference on Integrated Optics, Cambridge, 2010, paper WeP16.

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Figures (6)

Fig. 1.
Fig. 1.

Top view of the structure of a linear waveguide taper. W0 is the width of the single-mode waveguide, Wmax is the maximum taper width, L is the length of the taper, θ is the local half angle of the taper at point z, and θm is the projection of the ray angle of the first-order mode of the taper.

Fig. 2.
Fig. 2.

Transmission dependence on the constant α of the silicon waveguide taper designed using Eq. (2), at a wavelength of 1550 nm.

Fig. 3.
Fig. 3.

Transmission of a taper designed according to Eq. (2) as a function of the length of the taper. For comparison, linear, parabolic, exponential, and Gaussian taper types are included.

Fig. 4.
Fig. 4.

Simulated field intensity |E|2 for the various tapers at a wavelength of 1550 nm. (a) 5-μm-long adiabatic taper designed using Eq. (2), (b) 5-μm-long exponential taper, (c) 5-μm-long parabolic taper, (d) 5-μm-long Gaussian taper, (e) 5-μm-long linear taper, and (f) 15-μm-long linear taper.

Fig. 5.
Fig. 5.

Transmission of the tapers as a function of taper length at a wavelength of 1550 nm. The widths of the input and output waveguides are 12 and 0.5 μm, respectively.

Fig. 6.
Fig. 6.

Transmission of the designed taper for different taper thicknesses as a function of taper length, for the fundamental TE mode at a wavelength of 1550 nm.

Equations (2)

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θ<λ02Wneff,
θ=αλ02Wneff.

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