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Proceedings Paper

High-speed electro-optical silicon modulators based on photonic crystal waveguides
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Paper Abstract

An ultra-compact silicon Mach-Zehnder interferometer (MZI) modulator featuring p-i-n-diode-embedded photonic crystal waveguides has been fabricated. As carrier injection is the only practical option for optical modulation in silicon, a lower limit of current density (~104A/cm2) exists for achieving gigahertz modulation in the widely employed p-i-n diode configuration. Electrical simulations have been performed to design and analyze the device. The device interaction length was reduced by one order of magnitude compared to the conventional waveguide based MZI modulators by taking advantage of the slow group velocity exhibited by photonic crystal waveguides (PCWs). A maximum modulation depth of 93% has been obtained under an injected current of 7.1 mA. High-speed optical modulation at 1 Gbit s-1 in the 1.55 micron wavelength region was experimentally demonstrated. To our knowledge, this is the fastest speed ever achieved for a p-i-n diode based integrated silicon MZI modulator.

Paper Details

Date Published: 9 February 2007
PDF: 9 pages
Proc. SPIE 6477, Silicon Photonics II, 64770Z (9 February 2007); doi: 10.1117/12.707802
Show Author Affiliations
Lanlan Gu, The Univ. of Texas at Austin (United States)
Wei Jiang, The Univ. of Texas at Austin (United States)
Omega Optics, Inc. (United States)
Xiaonan Chen, The Univ. of Texas at Austin (United States)
Li Wang, The Univ. of Texas at Austin (United States)
Ray T. Chen, The Univ. of Texas at Austin (United States)


Published in SPIE Proceedings Vol. 6477:
Silicon Photonics II
Joel A. Kubby; Graham T. Reed, Editor(s)

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