Multimode Interference Mach-Zehnder Interferometer Research Articles

Polymeric Multimode Interference Mach–Zehnder Interferometer Electro-Optic Switch Using Embedded Coplanar Waveguide Electrode: Theory, Design, and Analysis

The self-imaging theory is improved for designing a polymer multimode interference Mach–Zehnder interferometer electro-optic switch. The electro-optic overlap factor is enhanced from 0.6510 to 0.9658 through adopting an embedded coplanar waveguide electrode. Considering the mode dispersion effect, formulations of time-domain response are derived, and switching characteristics are analyzed. The total device length is about 7.175 mm, the switching voltage is 2.622 V, and the switching time is 29.90 ps. The lightwave 3-dB bandwidth is 20 nm, the insertion loss is less than 2.70 dB, and the crosstalk under cross and bar states are less than −55 dB and −45 dB, respectively.

Low power <inline-formula><math display="inline" overflow="scroll"><mrow><mn>2</mn><mo>×</mo><mn>2</mn></mrow></math></inline-formula> thermo-optic polymer waveguide switch

A low-power 2×2 multimode interference-Mach Zehnder interferometer thermo-optic switch is proposed and fabricated using a cross-linkable negative photoresist as core material. The waveguide can be easily fabricated by direct ultraviolet photolithography and wet etching processes. The experiment results show that the switch has a low switching power of 6.9 mW and a switching time of 0.4 ms.

Small AC Driving Voltage for MZI-Based GaAs–GaAlAs Electrooptic Modulators/Switches With Coplanar Electrodes

We report a method to achieve a small ac driving voltage for high-speed multimode interference Mach-Zehnder interferometer GaAs-GaAlAs electrooptic modulators and switches with coplanar electrodes for polarization-insensitive operation. By biasing the devices in the reverse break-down region, the ac driving voltage can be as small as 3 V. Such a small ac driving voltage is important for high-speed optical modulators and switches. The physics behind this small ac driving voltage is also discussed.

Design of a 2 × 2 MMI MZI SOI electro‐optic switch covering C band and L band

AbstractThis Letter a 2 × 2 multimode interference (MMI) Mach–Zehnder interferometer (MZI) electro‐optic switch is designed for operation at 1.55‐μm wavelength. This electro‐optic switch is designed based on silicon‐on‐insulator (SOI) waveguides. With the use of an SOI phase shifter designed in the MZI switch, a 2 × 2 electro‐optic switch can be achieved on Si substrate. The electro‐optic switch size is only 1 mm long. The 3‐dB operating optical wavelength bandwidth can cover the C and L bands. This wideband MMI MZI electro‐optic switch can be applied in broadband optical fiber communication systems. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 33: 262–265, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10292

Proposal of a wavelength-selective switch based on an MMIMZI configuration with wavelength-selective phase-tuning circuits

This paper proposes a novel photonic device for wavelength-selective switching. The device is based on a multimode-interference Mach-Zehnder interferometer (MMIMZI) configuration with wavelength-selective phase-tuning circuits (WSPTC). Mode propagation theory is used for the analysis of this device.