Multiple Resonance Interferometer for Low Voltage Modulation
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Solution Overview
Problem
Current high-speed modulators in communications systems face performance limitations due to high drive voltage requirements, high power consumption, large footprint, and high insertion loss, which increase device cost and reduce system efficiency.
Innovation Solution
A multiple resonant Mach Zehnder interferometer with integrated resonant structures that introduce a large phase shift with a small refractive index change, allowing for full phase modulation using low drive voltage and minimizing insertion loss through compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional high speed modulators are implemented in lithium niobate and InP as discrete components, then high speed modulation is achieved, but the device occupies a large footprint and requires high drive voltage
Solution Approach 1:
The patent integrates multiple functional components (modulator, optical elements, resonant structures) into a single integrated photonic device, combining previously discrete components into one compact unit that achieves high-speed modulation without occupying large footprint
Solution Approach 2:
The patent transitions from discrete component assembly to integrated photonic circuit implementation, effectively moving the system from a spatially distributed architecture to a planar integrated structure that maintains functionality while reducing footprint
2Speed
If conventional high speed modulators are implemented with discrete optical elements, then high speed modulation is achieved, but high insertion loss occurs during integration with other optical systems
Solution Approach 1:
The patent integrates the modulator with other optical system components into a unified integrated photonic device, eliminating discrete optical element interfaces that cause high insertion loss while maintaining high-speed modulation capability
3Speed
If conventional high speed modulators are implemented, then high speed modulation is achieved, but high power consumption results from high drive voltage requirements
Solution Approach 1:
The patent modifies the operational parameters of the modulator by implementing resonant structures that enhance the interaction between light and the modulating medium, allowing high-speed modulation to be achieved at lower drive voltages and thus reducing power consumption
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
The solution enables full phase modulation with low drive voltage and reduced insertion loss, resulting in efficient and cost-effective high-speed modulators with a small footprint, suitable for phase shift keying implementations.
Implementation Method 1
a large change in the phase shift can be introduced by a small input signal (e.g., a small refractive index change). Because of the integration of the coupled resonant structures, the index variation that is introduced is enhanced by the resonant nature of the structure.
Implementation Method 2
High speed modulators using, for example, Mach Zehnder interferometer designs
Data Source
AI summary
A multiple resonance interferometer structure includes an input port and a first arm coupled to the input port and including a first resonant structure. The multiple resonance interferometer also includes a second arm coupled to the input port and including a second resonant structure and an output port coupled to the first arm and the second arm.