Multi-Level Pulse Amplitude Modulated Signal Encoding
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Solution Overview
Problem
Conventional copper data channels face limitations due to signal attenuation and crosstalk, which are only partially mitigated by existing techniques like equalization, coding, and shielding, leading to power consumption, complexity, and scalability issues, while optical communication offers a more promising but unexploited solution.
Innovation Solution
A system and method for encoding multi-level pulse amplitude modulated signals using integrated optoelectronics, specifically utilizing a photonically enabled CMOS chip with Mach-Zehnder interferometers and ring modulators, synchronized electrical input signals, and multiplexers to generate high-speed optical modulation, reducing power consumption and increasing scalability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If equalization, coding, and shielding techniques are used to mitigate signal attenuation and crosstalk in copper data channels, then signal quality is improved, but power consumption, device complexity, and cable bulk increase
Solution Approach 1:
The patent replaces electrical signal transmission through copper channels with optical signal transmission through optical channels. This substitution eliminates the need for equalization, coding, and shielding techniques required in electrical systems, thereby reducing device complexity and power consumption while maintaining or improving signal quality. The optical modulator directly modulates optical signals to achieve reliable transmission without the complex mitigation techniques needed for copper channels.
2Reliability
If equalization, coding, and shielding techniques are used to mitigate signal attenuation and crosstalk in copper data channels, then signal quality is improved, but power consumption increases
Solution Approach 1:
The patent substitutes optical transmission for electrical transmission, eliminating the power-hungry equalization, coding, and shielding techniques. Optical signals inherently suffer less from attenuation and crosstalk, allowing for simpler, lower-power transmission systems. The optical modulator efficiently converts electrical signals to optical signals with minimal power consumption compared to the cumulative power required for multiple mitigation techniques in copper channels.
3Adaptability or versatility
If conventional copper data channels are used, then existing infrastructure is maintained, but scalability and reach are limited
Solution Approach 1:
The patent replaces the constrained copper channel system with an optical channel system that offers superior scalability and reach. Optical fibers can transmit signals over much longer distances without degradation and support higher bandwidths, enabling system expansion and adaptation to growing data transmission requirements. The integrated optoelectronic design facilitates seamless integration with existing infrastructure while overcoming copper channel limitations.
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 approach enhances data throughput and reduces power consumption by achieving high-speed optical modulation with increased scalability, overcoming the limitations of copper data channels through efficient use of integrated optoelectronics.
Implementation Method 1
generating a multi-level, amplitude-modulated optical signal utilizing an optical modulator driven by two or more of a plurality of electrical input signals
Implementation Method 2
The optical modulator may comprise a Mach-Zehnder interferometer
Data Source
AI summary
Methods and systems for encoding multi-level pulse amplitude modulated signals using integrated optoelectronics are disclosed and may include generating a multi-level, amplitude-modulated optical signal utilizing an optical modulator driven by first and second electrical input signals, where the optical modulator may configure levels in the multi-level amplitude modulated optical signal, drivers are coupled to the optical modulator; and the first and second electrical input signals may be synchronized before being communicated to the drivers. The optical modulator may include optical modulator elements coupled in series and configured into groups. The number of optical modular elements and groups may configure the number of levels in the multi-level amplitude modulated optical signal. Unit drivers may be coupled to each of the groups. The electrical input signals may be synchronized before communicating them to the unit drivers utilizing flip-flops. Phase addition may be synchronized utilizing one or more electrical delay lines.