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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 24, Iss. 2 — Feb. 1, 2006
  • pp: 1000–

A High-Performance Si-Based MOS Electrooptic Phase Modulator With a Shunt-Capacitor Configuration

Xiaoguang Tu, Shaowu Chen, Lei Zhao, F. Sun, Jinzhong Yu, and Qiming Wang

Journal of Lightwave Technology, Vol. 24, Issue 2, pp. 1000- (2006)


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Abstract

A novel Si-based metal-oxide-semiconductor (MOS) electrooptic phase modulator including two shunt oxide layer capacitors integrated on a silicon-on-insulator (SOI) waveguide is simulated and analyzed. The refractive index near the two gate oxide layers is modified by the free carrier dispersion effect induced by applying a positive bias on the electrodes. The theoretical calculation of free carrier distribution coupled with optical guided mode propagation characteristics has been carried out. The influence of the structure parameters such as the width and the doping level of the active region are analyzed. A half-wave voltage Vpi = 4 V is demonstrated with an 8-mm active region length and a 4-µm width of an inner rib under an accumulation mode. When decreasing the inner rib width to 1 µm, the phase modulation efficiency is even higher, and the rise and fall times reach 50 and 40 ps, respectively, with a 1.0 × 1017 cm-3 doping level in the active region.

© 2006 IEEE

Citation
Xiaoguang Tu, Shaowu Chen, Lei Zhao, F. Sun, Jinzhong Yu, and Qiming Wang, "A High-Performance Si-Based MOS Electrooptic Phase Modulator With a Shunt-Capacitor Configuration," J. Lightwave Technol. 24, 1000- (2006)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-24-2-1000

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