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Related Experiment Video

Updated: Jun 6, 2026

Characterization of Anisotropic Leaky Mode Modulators for Holovideo

Characterization of Anisotropic Leaky Mode Modulators for Holovideo

Published on: March 19, 2016

Linearized electro-optic modulators based on a two-section Y-fed directional coupler.

Beomsuk Lee¹, Che-Yun Lin, Alan X Wang

¹The University of Texas at Austin, 10100 Burnet Road, Austin, Texas 78758, USA. bslee74@gmail.com

|November 25, 2010

Summary

This summary is machine-generated.

This study presents a novel electro-optic polymer waveguide modulator. It achieves a higher spurious-free dynamic range than conventional modulators using a Y-fed directional coupler.

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Area of Science:

Photonics
Materials Science
Electrical Engineering

Background:

Electro-optic (EO) modulators are crucial for optical communication.
Conventional Mach-Zehnder modulators suffer from limitations in dynamic range.

Purpose of the Study:

To demonstrate a linearized Y-fed directional coupler (DC) modulator.
To improve the spurious-free dynamic range (SFDR) compared to existing technologies.

Main Methods:

Fabrication of a Y-fed DC modulator using EO polymer waveguide.
Implementation of the reversed delta-beta (Δβ) technique in a two-section Y-fed DC.
Characterization of the device at 1.55 μm wavelength.

Main Results:

Achieved a spurious-free dynamic range of 119 dB/Hz²/³.
Demonstrated an 11 dB improvement in SFDR over conventional Mach-Zehnder modulators.
Obtained an in-device EO coefficient (r33) of 79 pm/V, 88% of the single film value.

Conclusions:

The linearized Y-fed DC modulator offers superior performance.
The reversed Δβ technique effectively enhances the dynamic range.
EO polymer waveguides are promising for high-performance modulator applications.