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This study demonstrates a hybrid silicon modulator with electro-optic (EO) polymer for efficient optical modulation. The device achieves high-speed data transmission up to 52 Gbit/s, highlighting its potential for advanced communication systems.

Area of Science:

Photonics and Materials Science
Integrated Optics
Optoelectronics

Background:

Efficient electro-optic (EO) modulation is crucial for high-speed optical communication.
Hybrid silicon structures integrating EO polymers offer potential for advanced modulator designs.
Strong optical field confinement is essential for effective poling and modulation of EO polymers.

Purpose of the Study:

To investigate the performance of a hybrid silicon modulator utilizing an EO polymer.
To analyze the impact of waveguide design and material properties on EO modulation efficiency.
To demonstrate high-speed data transmission capabilities of the developed modulator.

Main Methods:

Fabrication of a hybrid silicon modulator with an in-plane coplanar waveguide and electrode structure.

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Utilizing silica-based side claddings and an EO core for enhanced optical field confinement.

Characterization of electric poling efficiency, modulation performance, and high-speed signaling.

Main Results:

Achieved a half-wave-voltage length product (VπL) of 1.9 V·cm at 1,550 nm for TE mode.
Demonstrated on-off-keying transmission at signal rates up to 52 Gbit/s.
Obtained a Q factor of 6.1 at a drive voltage of 2.0 Vpp, confirming high-speed capabilities.

Conclusions:

The hybrid silicon modulator with EO polymer exhibits efficient electro-optic modulation.
Waveguide design and material properties significantly influence poling and modulation efficiency.
The device demonstrates promising performance for high-speed optical communication applications.