Abstract

Coupling light from an optical fibre to small optical waveguides is particularly problematic in semiconductors, since the refractive index of the silica fibre is very different from that of a semiconductor waveguide. There have been several published methods of achieving such coupling, but none are sufficiently efficient whilst being robust enough for commercial applications. In this paper experimental results of our approach called a Dual-Grating Assisted Directional Coupler, are presented. The principle of coupling by this novel method has been successfully demonstrated, and a coupling efficiency of 55% measured.

© 2005 Optical Society of America

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References

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Elect. Express (1)

O. Boyraz and B. Jalali, �??Demonstration of 11dB fiber-to-fiber gain in a silicon Raman amplifier,�?? IEICE Elect. Express 1, 429-434 (2004).
[CrossRef]

IEE Proc. Optoelectron (1)

G. Z. Masanovic, V. M. N. Passaro, and G. T. Reed, �??Coupling to nanophotonic waveguides using a dual grating-assisted directional coupler,�?? IEE Proc. Optoelectron. 152, 41-48 (2005).
[CrossRef]

IEEE Inter. Conf. on Interconnect Tech. (1)

R. Orobtchouk, N. Schnell, T. Benyattou, J. Gregoire, S. Lardenois, M. Heitzmann, and J. M. Fedeli, �??New ARROW optical coupler for optical interconnect,�?? in Proceedings of IEEE International Conference on Interconnect Technology (2003), pp 233-235.

IEEE Photonics Technol. Lett. (1)

G. Z. Masanovic, V. M. N. Passaro, and G. T. Reed, �??Dual grating-assisted directional coupling between fibres and thin semiconductor waveguides,�?? IEEE Photonics Technol. Lett. 15, 1395-1397 (2003).
[CrossRef]

J. Electrochem. Soc. (1)

V. S. Nguyen, S. Burton, and P. Pan, �??The variation of physical properties of plasma-deposited silicon nitride and oxynitride with their compositions,�?? J. Electrochem. Soc. 131, 2348-2353 (1984).
[CrossRef]

J. Lightwave Technol. (4)

Nature (3)

H. Rong, R. Jones, A. Liu, O. Cohen, D. Hak, A. Fang, and M. Paniccia, �??A continuous-wave Raman silicon laser,�?? Nature 433, 725-728 (2005).
[CrossRef] [PubMed]

V. R. Almeida, C. A. Barrios, R. R. Panepucci, and M. Lipson, �??All-optical control of light on a silicon chip,�?? Nature 431, 1081-1084 (2004).
[CrossRef] [PubMed]

A. Liu, R. Jones, L. Liao, D. Samara-Rubio, D. Rubin, O. Cohen, R. Nicolaescu, and M. Paniccia, �??A high-speed silicon optical modulator based on a metal-oxide-semiconductor capacitor,�?? Nature 427, 615-618 (2004).
[CrossRef] [PubMed]

Opt. Express (3)

Opt. Express 12 (1)

A. Liu, H. Rong, M. Paniccia, O. Cohen, and D. Hak, �??Net optical gain in a low loss silicon-on-insulator waveguide by stimulated Raman scattering,�?? Opt. Express 12, 4261�??4267 (2004),<a href=" http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-18-4261">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-12-18-4261</a>
[CrossRef] [PubMed]

Opt. Lett. (2)

Proc. SPIE (1)

J. J. Fijol, E. E. Fike, P. B. Keating, D. Gilbody, J. J. LeBlanc, S. A. Jacobson, W. J. Kessler, and M. B. Frish, �??Fabrication of silicon-on-insulator adiabatic tapers for low-loss optical interconnection of photonic devices,�?? in Photonics Packaging and Integration III, R. A. Heyler, D. J. Robbins, and G. E. Jabbour, eds., Proc. SPIE 4997, 157-170 (2003).
[CrossRef]

SPIE (1)

K. Yamada, M. Notomi, I. Yokohama, T. Shoji, T. Tsuchizawa, T. Watanabe, J. Takahashi, E. Tamechika, and H. Morita, �??SOI-based photonic crystal line defect waveguides,�?? in Proc. SPIE 4870, 324�??338 (2002).
[CrossRef]

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Figures (5)

Fig. 1.
Fig. 1.

Dual grating-assisted directional coupler in SOI [13]

Fig. 2.
Fig. 2.

‘Double’ DGADC configuration.

Fig. 3.
Fig. 3.

Typical SEM micrograph of a fabricated DGADC.

Fig. 4.
Fig. 4.

Typical output from a ‘double’ DGADC.

Fig. 5.
Fig. 5.

Coupling efficiency of DGADC can be as high as 55% and resonant peak position can be changed for different grating periods still achieving high efficiency.

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