Verified equivalent-circuit model for slot-waveguide modulators

Optics Express, vol. 28, pp. 12951

Abstract

We formulate and experimentally validate an equivalent-circuit model based on distributed elements to describe the electric and electro-optic (EO) properties of travelling-wave silicon-organic hybrid (SOH) slot-waveguide modulators. The model allows to reliably predict the small-signal EO frequency response of the modulators exploiting purely electrical measurements of the frequency-dependent RF transmission characteristics. We experimentally verify the validity of our model, and we formulate design guidelines for an optimum trade-off between optical loss due to free-carrier absorption (FCA), electro-optic bandwidth, and π-voltage of SOH slot-waveguide modulators.

Authors 10

1. Heiner Zwickel

   Karlsruhe Institute of Technology

   Affiliation as printed

   Institute of Photonics and Quantum Electronics (IPQ), Karlsruhe Institute of Technology (KIT), Germany

2. Stefan Singer

   Karlsruhe Institute of Technology

   Affiliation as printed

   Institute of Photonics and Quantum Electronics (IPQ), Karlsruhe Institute of Technology (KIT), Germany

3. Clemens Kieninger

   Karlsruhe Institute of Technology

   Affiliation as printed

   Institute of Microstructure Technology (IMT), Karlsruhe Institute of Technology (KIT), Germany

   Institute of Photonics and Quantum Electronics (IPQ), Karlsruhe Institute of Technology (KIT), Germany

4. Y. Kutuvantavida

   Karlsruhe Institute of Technology

   Affiliation as printed

   Institute of Microstructure Technology (IMT), Karlsruhe Institute of Technology (KIT), Germany

   Institute of Photonics and Quantum Electronics (IPQ), Karlsruhe Institute of Technology (KIT), Germany

5. Narek Muradyan

   Karlsruhe Institute of Technology

   Affiliation as printed

   Institute of Photonics and Quantum Electronics (IPQ), Karlsruhe Institute of Technology (KIT), Germany

6. T. Wahlbrink Aachen AMO GmbH

   AMO (Germany)

   Affiliation as printed

   AMO GmbH, Aachen, Germany

7. Shiyoshi Yokoyama

   Kyushu University

   Affiliation as printed

   Institute for Materials Chemistry and Engineering, Kyushu University, Japan

8. Sebastian Randel

   Karlsruhe Institute of Technology

   Affiliation as printed

   Institute of Photonics and Quantum Electronics (IPQ), Karlsruhe Institute of Technology (KIT), Germany

9. W. Freude

   Karlsruhe Institute of Technology

   Affiliation as printed

   Institute of Photonics and Quantum Electronics (IPQ), Karlsruhe Institute of Technology (KIT), Germany

10. Christian G. Koos corresponding

    Karlsruhe Institute of Technology

    Affiliation as printed

    Institute of Microstructure Technology (IMT), Karlsruhe Institute of Technology (KIT), Germany

    Institute of Photonics and Quantum Electronics (IPQ), Karlsruhe Institute of Technology (KIT), Germany