Add-Drop Micro-Ring Modulator for Nonlinear Loss Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Micro-ring modulators experience non-linear effects such as self-heating and two-photon absorption due to high laser power, degrading modulation speed, quality factor, and optical modulation amplitude, which hinder high-speed data communication.
Innovation Solution
Incorporating a P/N junction within the micro-ring modulator and optimizing the coupling coefficients between waveguides to reduce non-linear effects, using a passive add-drop waveguide configuration to improve modulation efficiency and maintain modulation bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high laser power is applied to meet optical link budget requirements, then the optical signal can be transmitted, but non-linear effects (self-heating and two-photon absorption) are induced which reduce communication bandwidth and degrade performance
Solution Approach 1:
The patent extracts the harmful non-linear effects by introducing a passive add-drop micro-ring resonator that selectively removes trapped laser energy from the system. The resonator couples out the resonant wavelength component that causes self-heating and two-photon absorption, while allowing the optical signal to pass through, thereby separating the useful signal transmission from the harmful energy trapping
Solution Approach 2:
The passive add-drop micro-ring resonator acts as an intermediary element between the input and output waveguides. It mediates the optical signal by providing an alternative path for the resonant wavelength component, allowing controlled energy extraction without directly interfering with the main signal transmission path, thus reducing non-linear effects while maintaining signal integrity
2Speed
If passive add-drop micro-ring modulator is used to reduce non-linear effects, then bandwidth is improved, but quality factor and optical modulation amplitude are degraded due to extra coupling
Solution Approach 1:
The patent optimizes the coupling coefficients (κ1 and κ2) between the waveguides and the micro-ring resonator to achieve the desired balance. By carefully selecting these coupling parameters, the system achieves sufficient bandwidth expansion while minimizing the degradation of quality factor and optical modulation amplitude, thus tuning the system performance to meet both requirements
3Productivity
If micro-ring modulator is used for high-speed data communication, then data transmission rate is improved, but laser energy is trapped causing non-linear effects that degrade modulation speed and quality
Solution Approach 1:
The patent converts the harmful trapped laser energy into a beneficial effect by using the micro-ring resonator to selectively couple out the resonant wavelength component. This extracted energy can be utilized or dissipated harmlessly, while the main optical signal maintains its high-speed modulation capability, thus transforming the energy trapping problem into a solution that preserves both high data rate and fast modulation speed
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 effectively reduces non-linear effects, enabling high-speed data communication by maintaining the quality factor and modulation bandwidth while minimizing signal loss.
Implementation Method 1
a P/N junction configured to modulate a resonance frequency of the resonant waveguide until the light signal is resonant in the resonant waveguide
Implementation Method 2
a resonant waveguide coupled to the first waveguide... until the light signal is resonant in the resonant waveguide
Implementation Method 3
the laser energy may be trapped in the micro-ring modulator and the high laser power will induce non-linear effects, such as self-heating effects and two-photon absorption effects
Implementation Method 4
two-photon absorption effects
Data Source
AI summary
A method for operating an optical device is provided. The optical device includes a first waveguide, a second waveguide, and a resonant waveguide. The method includes coupling a light signal into the first waveguide through an input port of the first waveguide, and coupling the resonant waveguide to the first waveguide. The resonant waveguide includes a P/N junction configured to modulate a resonance frequency of the resonant waveguide until the light signal is resonant in the resonant waveguide. The method further includes coupling the second waveguide to the resonant waveguide to output the light signal to a drop port of the second waveguide.