Fig. 1. (a) Schematic diagram of a MZI-based 2×2 electro-optic switch. (b) Equivalent circuit of the switch with a push–pull configuration.

Fig. 2. Schematic diagrams of different modulation schemes. (a) Single-arm modulation. (b) Push–pull modulation. (c) Double-arm modulation with a pre-biased π/2 phase shift. (d) Push–pull modulation with a pre-biased π/2 phase shift.

Fig. 3. (a) The fabricated SOI-based 2×2 electro-optic switch. (b) The doping profile of the waveguide used as a modulation arm.

Fig. 4. Normalized transmission as a function of the applied current under the push–pull modulation with a pre-biased π/2 phase shift at a wavelength of 1530 nm.

Fig. 5. Measured transmission spectra under the push–pull modulation with a pre-biased π/2 phase shift.

Fig. 6. Measured switching time of the electro-optic switch under the push–pull modulation with a pre-biased π/2 phase shift.