Abstract

A multichannel tapered coupler interfacing standard 250-$\mu$m-pitch low-numerical-aperture (NA) polarization-maintaining fiber arrays with ultradense 20-$\mu$m-pitch high-NA silicon waveguides is designed and fabricated. The coupler is based on an array of 12 dual-core glass waveguides on 250-$\mu$m pitch that are tapered to a 20-$\mu$m pitch, simultaneously providing both pitch and spot-size conversion. At the wide end, the inner core matches the NA and mode profile of standard single-mode fiber. When drawn and tapered, the inner core “vanishes” and the outer core, surrounded by the clad, matches the NA and mode profile of the on-chip photonic waveguide. Ultradense high-efficiency coupling to an array of Si photonic waveguides is demonstrated using a 12-channel polarization-maintaining-fiber pigtailed tapered coupler. Coupling to Si waveguides is facilitated using SiON spot-size converters integrated into the Si photonic IC to provide 2-3-$\mu$m mode field diameters compatible with the tapered coupler. The tapered coupler achieves ${<}1$ dB coupling losses to photonic waveguides. Furthermore, eight-channel coupling is shown with less than ${-}35$ dB crosstalk between channels. Finally, a 640-Gb/s wavelength-division-multiplexing signal is coupled into four waveguides occupying 80 $\mu$m of chip edge, providing 160-Gb/s per-channel bandwidths.

© 2010 IEEE

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  1. J. U. Knickerbocker, "3D and system-on-package technology," IBM J. Res. Dev. 52, (2008).
  2. D. Taillaert, H. Chong, P. Borel, L. Frandsen, R. M. De La Rue, R. Baets, "A compact two-dimensional grating coupler used as a polarization splitter," IEEE Photon. Technol. Lett. 15, 1249-1251 (2003).
  3. C. Gunn, "CMOS photonics, for high-speed interconnects," IEEE Micro 26, 58-68 (2006).
  4. S. J. McNab, N. Moll, Y. A. Vlasov, "Ultra-low loss photonic integrated circuits with membrane-type photonic crystal waveguides," Opt. Exp. 11, 2927-2939 (2003).
  5. T. Shoji, T. Tsuchizawa, T. Tatanabe, K. Yamada, H. Morita, "Low loss mode size converter from 0.3 um square Si wire to single mode fibers," Electron. Lett. 38, 1669-1670 (2002).
  6. V. Almeida, R. Panepupcci, M. Lipson, "Nanotaper for compact mode conversion," Opt. Lett. 28, 1302-1304 (2003).
  7. S. Assefa, C. Jahnes, Y. Vlasov, CMOS Compatible Integrated Dielectric Optical Waveguide Coupler and Fabrication U.S. Patent 7 738 753 (2009.).
  8. OZ OpticsTapered Lensed Fibers www.ozoptics.com (, 2010.).
  9. Nanonics Imaging, Inc.Tapered Lensed Fibers www.nanonics.co.il (, 2010.).
  10. D. Neugroschl, V. I. Kopp, J. Singer, G. Zhang, "‘Vanishing-core’ tapered coupler for interconnect applications," Proc. SPIE (2009).
  11. C. R. Doerr, L. Zhang, L. L. Buhl, V. I. Kopp, D. Neugroschl, G. Weiner, "Tapered dual-core fiber for efficient and robust coupling to InP photonic integrated circuits," Proc. Optical Fiber Communication Conference (OFC) 2009 (2009) pp. 1-3.
  12. R. R. Thomson, H. T. Bookey, N. D. Psaila, A. Fender, S. Campbell, W. N. MacPherson, J. S. Barton, D. T. Reid, A. K. Kar, "Ultrafast-laser inscription of a three dimensional fan-out device for multicore fiber coupling applications," Opt. Exp. 15, 11691-11697 (2007).
  13. Fimmwave and Fimmprop Software http://www.photond.com/products/fimmwave.htm Photon Design Inc. (2010.).

2008 (1)

J. U. Knickerbocker, "3D and system-on-package technology," IBM J. Res. Dev. 52, (2008).

2007 (1)

R. R. Thomson, H. T. Bookey, N. D. Psaila, A. Fender, S. Campbell, W. N. MacPherson, J. S. Barton, D. T. Reid, A. K. Kar, "Ultrafast-laser inscription of a three dimensional fan-out device for multicore fiber coupling applications," Opt. Exp. 15, 11691-11697 (2007).

2006 (1)

C. Gunn, "CMOS photonics, for high-speed interconnects," IEEE Micro 26, 58-68 (2006).

2003 (3)

S. J. McNab, N. Moll, Y. A. Vlasov, "Ultra-low loss photonic integrated circuits with membrane-type photonic crystal waveguides," Opt. Exp. 11, 2927-2939 (2003).

D. Taillaert, H. Chong, P. Borel, L. Frandsen, R. M. De La Rue, R. Baets, "A compact two-dimensional grating coupler used as a polarization splitter," IEEE Photon. Technol. Lett. 15, 1249-1251 (2003).

V. Almeida, R. Panepupcci, M. Lipson, "Nanotaper for compact mode conversion," Opt. Lett. 28, 1302-1304 (2003).

2002 (1)

T. Shoji, T. Tsuchizawa, T. Tatanabe, K. Yamada, H. Morita, "Low loss mode size converter from 0.3 um square Si wire to single mode fibers," Electron. Lett. 38, 1669-1670 (2002).

Electron. Lett. (1)

T. Shoji, T. Tsuchizawa, T. Tatanabe, K. Yamada, H. Morita, "Low loss mode size converter from 0.3 um square Si wire to single mode fibers," Electron. Lett. 38, 1669-1670 (2002).

IBM J. Res. Dev. (1)

J. U. Knickerbocker, "3D and system-on-package technology," IBM J. Res. Dev. 52, (2008).

IEEE Micro (1)

C. Gunn, "CMOS photonics, for high-speed interconnects," IEEE Micro 26, 58-68 (2006).

IEEE Photon. Technol. Lett. (1)

D. Taillaert, H. Chong, P. Borel, L. Frandsen, R. M. De La Rue, R. Baets, "A compact two-dimensional grating coupler used as a polarization splitter," IEEE Photon. Technol. Lett. 15, 1249-1251 (2003).

Opt. Exp. (2)

S. J. McNab, N. Moll, Y. A. Vlasov, "Ultra-low loss photonic integrated circuits with membrane-type photonic crystal waveguides," Opt. Exp. 11, 2927-2939 (2003).

R. R. Thomson, H. T. Bookey, N. D. Psaila, A. Fender, S. Campbell, W. N. MacPherson, J. S. Barton, D. T. Reid, A. K. Kar, "Ultrafast-laser inscription of a three dimensional fan-out device for multicore fiber coupling applications," Opt. Exp. 15, 11691-11697 (2007).

Opt. Lett. (1)

Other (6)

S. Assefa, C. Jahnes, Y. Vlasov, CMOS Compatible Integrated Dielectric Optical Waveguide Coupler and Fabrication U.S. Patent 7 738 753 (2009.).

OZ OpticsTapered Lensed Fibers www.ozoptics.com (, 2010.).

Nanonics Imaging, Inc.Tapered Lensed Fibers www.nanonics.co.il (, 2010.).

D. Neugroschl, V. I. Kopp, J. Singer, G. Zhang, "‘Vanishing-core’ tapered coupler for interconnect applications," Proc. SPIE (2009).

C. R. Doerr, L. Zhang, L. L. Buhl, V. I. Kopp, D. Neugroschl, G. Weiner, "Tapered dual-core fiber for efficient and robust coupling to InP photonic integrated circuits," Proc. Optical Fiber Communication Conference (OFC) 2009 (2009) pp. 1-3.

Fimmwave and Fimmprop Software http://www.photond.com/products/fimmwave.htm Photon Design Inc. (2010.).

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