Journal
OPTICS EXPRESS
Volume 18, Issue 8, Pages 7994-7999Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.007994
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- DARPA MTO office [HR0011-08-9-0001]
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We demonstrate a very efficient high speed silicon modulator with an ultralow pi-phase-shift voltage-length product V pi L = 1.4V-cm. The device is based on a Mach-Zehnder interferometer (MZI) fabricated using 0.25 mu m thick silicon-on-insulator (SOI) waveguide with offset lateral PN junctions. Optimal carrier-depletion induced index change has been achieved through the optimization of the overlap region of carriers and photons. The 3dB bandwidth of a typical 1mm long device was measured to be more than 12GHz. An eye-diagram taken at a transmission rate of 12.5Gb/s confirms the high speed capability of the device. (C) 2010 Optical Society of America
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