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Proceedings Paper

Coupling to 1-um silicon modulators
Author(s): Ching Eng Png; Goran Masanovic; Graham T. Reed
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Paper Abstract

Optical modulation in silicon photonics is performed either via the plasma dispersion effect, or by thermal means. Both are relatively slow processes when utilized in large (multi micron) waveguide structures. However, modulators based on the plasma dispersion effect become much faster in smaller waveguides, but coupling to such waveguides is then inefficient. In this paper we discuss both the operation of small waveguide modulators and a potentially more efficient means of coupling to such waveguides. A number of design parameters of the modulators are discussed including the optimum configuration of a three terminal p-i-n diode around a rib waveguide, and the optimization of both the power efficiency and the operating speed of the device. Operating speed is theoretically increased by as much as 7400% with respect to devices in the literature. The problem of coupling to these waveguides is addressed via gratings. All work is theoretical, but sets the groundwork for subsequent fabrication.

Paper Details

Date Published: 27 March 2002
PDF: 8 pages
Proc. SPIE 4654, Silicon-based and Hybrid Optoelectronics IV, (27 March 2002); doi: 10.1117/12.463858
Show Author Affiliations
Ching Eng Png, Univ. of Surrey (United Kingdom)
Goran Masanovic, Univ. of Surrey (United Kingdom)
Graham T. Reed, Univ. of Surrey (United Kingdom)

Published in SPIE Proceedings Vol. 4654:
Silicon-based and Hybrid Optoelectronics IV
David J. Robbins; Ghassan E. Jabbour, Editor(s)

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