Distributed Optoelectronic Receiver with Multi-Band TIAs
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Solution Overview
Problem
Conventional copper data channels face limitations due to signal attenuation and crosstalk, which are only modestly improved by existing techniques like equalization, coding, and shielding, and lack scalability, prompting the need for a more effective solution.
Innovation Solution
A distributed optoelectronic receiver system utilizing a grating coupler, splitter, photodiodes, and transimpedance amplifiers (TIAs) to receive and amplify modulated optical signals, with each TIA configured for different frequency ranges and coupled to perform optical continuous linear equalization and filtering, enabling improved frequency response and 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 to some extent, but power consumption, device complexity, and cable bulk increase significantly
Solution Approach 1:
The patent replaces copper electrical transmission with optical transmission using photonic integrated circuits. Light signals propagate through waveguides instead of electrical signals through copper conductors, eliminating the need for equalization, coding, and shielding techniques while achieving superior signal quality and reduced system complexity
Solution Approach 2:
The invention changes the fundamental transmission parameter from electrical signals to optical signals. By using different physical domains (optical instead of electrical), the system achieves the same communication function without the limitations and complexity associated with copper-based equalization and shielding techniques
2Reliability
If equalization, coding, and shielding techniques are applied to copper data channels, then signal attenuation and crosstalk are mitigated, but power consumption increases considerably
Solution Approach 1:
The patent substitutes optical transmission for electrical transmission, eliminating the need for power-intensive equalization and shielding circuits. The photonic integrated circuit uses low-power optical components including waveguides, photodiodes, and transimpedance amplifiers that consume significantly less power than copper-based mitigation techniques
3Reliability
If copper data channels use conventional mitigation techniques, then some signal quality improvement is achieved, but scalability is severely limited
Solution Approach 1:
The invention replaces copper transmission with optical transmission in photonic integrated circuits, enabling scalable systems that can be integrated with standard CMOS processes. The optical architecture supports higher bandwidth and longer reach without the scalability limitations of copper-based mitigation techniques
Solution Approach 2:
The photonic integrated circuit provides a universal platform that can handle multiple functions including signal reception, optical-to-electrical conversion, and amplification within a single integrated structure, enabling scalable deployment across different applications and bandwidth requirements
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 system achieves enhanced receiver sensitivity and frequency response, reducing signal distortion and jitter, and overcoming the limitations of conventional copper data channels by effectively processing optical signals across a wide frequency range.
Implementation Method 1
receiving a modulated optical signal utilizing the grating coupler
Implementation Method 2
generating a plurality of electrical signals from the plurality of optical signals utilizing the plurality of photodiodes
Data Source
AI summary
Methods and systems for a distributed optoelectronic receiver are disclosed and may include an optoelectronic receiver having a grating coupler, a splitter, a plurality of photodiodes, and a plurality of transimpedance amplifiers (TIAs). The receiver receives a modulated optical signal utilizing the grating coupler, splits the received signal into a plurality of optical signals, generates a plurality of electrical signals from the plurality of optical signals utilizing the plurality of photodiodes, communicates the plurality of electrical signals to the plurality of TIAs, amplifies the plurality of electrical signals utilizing the plurality of TIAs, and generates an output electrical signal from coupled outputs of the plurality of TIAs. Each TIA may be configured to amplify signals in a different frequency range. One of the plurality of electrical signals may be DC coupled to a low frequency TIA of the plurality of TIAs.