Electro-Optic Modulator Ferroelectric Blocks Electric Field
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Solution Overview
Problem
Current electro-optic modulators face challenges in achieving high electric field intensity while minimizing optical signal loss, particularly in micro-sized and low power consumption designs for advanced communication technologies like 5G and 6G.
Innovation Solution
The electro-optic modulator incorporates ferroelectric blocks disposed between traveling-wave electrodes and an optical waveguide, with specific distances and protruding portions to enhance electric field intensity and reduce signal loss, utilizing LiNbO3 materials for the waveguide and blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the distance between traveling-wave electrodes and optical waveguide is reduced to increase electric field intensity, then electric field intensity increases, but optical signal loss increases
Solution Approach 1:
Ferroelectric blocks are introduced as intermediary elements between the traveling-wave electrodes and the optical waveguide. These blocks have a higher refractive index than the surrounding clad layers, creating optical confinement that guides light closer to the electrode region. This mediator enables strong electric field interaction while preventing direct contact between electrodes and waveguide, thus avoiding optical signal loss.
Solution Approach 2:
The ferroelectric blocks create a localized region with different optical properties (higher refractive index) specifically where electric field interaction is needed. This local modification of optical quality allows the electric field to be concentrated in the ferroelectric block region without causing loss throughout the entire waveguide structure.
2Stress or pressure
If ferroelectric blocks are positioned closer to optical waveguide than electrodes, then electric field intensity increases, but device complexity increases
Solution Approach 1:
The ferroelectric blocks serve multiple functions simultaneously: they act as optical confinement elements (waveguide), electric field interaction regions (modulator core), and structural support. By merging these functions into a single component, the overall device complexity is reduced despite the sophisticated functionality achieved.
Solution Approach 2:
The ferroelectric blocks perform multiple roles: optical waveguiding, electric field interaction, and structural positioning. This multi-functionality eliminates the need for separate components for each function, simplifying the overall device architecture while achieving high electric field intensity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration increases the electric field intensity and minimizes optical signal loss, optimizing performance for high-speed and low power consumption applications.
Implementation Method 1
ferroelectric blocks disposed between the traveling-wave electrodes and the lower clad layer, each of the ferroelectric blocks having a second distance less than the first distance with respective to the optical waveguide
Implementation Method 2
an electro-optic modulator including: a lower clad layer disposed on a substrate; an optical waveguide disposed on the lower clad layer; traveling-wave electrodes respectively disposed on both sides of the optical waveguide
Data Source
AI summary
Disclosed is an electro-optic modulator. The electro-optic modulator includes a lower clad layer disposed on a substrate, an optical waveguide disposed on the lower clad layer, traveling-wave electrodes respectively disposed on both sides of the optical waveguide and each having a first distance to the optical waveguide, and ferroelectric blocks disposed between the traveling-wave electrodes and the lower clad layer and each having a second distance to the optical waveguide, which is less than the first distance.