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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 29,
  • Issue 8,
  • pp. 1112-1117
  • (2011)

Sub-Volt Silicon-Organic Electro-optic Modulator With 500 MHz Bandwidth

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Abstract

Lowering the operating voltage of electro-optic modulators is desirable for a variety of applications, most notably in analog photonics and digital data communication. In particular for digital systems such as CPUs, it is desirable to develop modulators that are both temperature-insensitive and compatible with typically sub-2 V CMOS electronics; however, drive voltages in silicon-based Mach–Zehnder interferometers (MZIs) currently exceed 1.8 V. Here, we show an MZI modulator based on an electro-optic polymer-clad silicon slot waveguide, with a halfwave voltage of only 0.69 V (corresponding to a 0.62 V$\left(\cdot\right)$cm modulation figure of merit), and a bandwidth of 500 MHz. We also show that there are paths to significantly improve both the bandwidth and drive voltage.

© 2011 IEEE

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