Silicon Photonics Transceiver for Parallel Optical and WDM Operation
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Solution Overview
Problem
Conventional copper data channels face signal attenuation and crosstalk due to radiated electromagnetic energy, which are difficult to mitigate effectively with existing techniques, limiting scalability and requiring significant power and complexity.
Innovation Solution
A photonically-enabled integrated circuit with selectable parallel optical fiber and wavelength division multiplexing (WDM) operation, utilizing optoelectronic devices like Mach-Zehnder modulators, photodiodes, and grating couplers to efficiently process and transmit optical signals, allowing for dynamic configuration between different communication protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If copper data channels are used to meet bandwidth requirements, then data transmission capability is improved, but signal attenuation and crosstalk increase due to radiated electromagnetic energy
Solution Approach 1:
The patent replaces copper electrical transmission with optical transmission using photonic integrated circuits. Optical signals propagate through waveguides without radiating electromagnetic energy, eliminating crosstalk and signal attenuation issues inherent in copper channels while maintaining high bandwidth capability.
Solution Approach 2:
The patent introduces optical waveguides as an intermediary medium to transmit data between photonic components. These waveguides guide optical signals without electromagnetic radiation, providing a reliable transmission path that avoids the crosstalk and attenuation problems of copper channels.
2Reliability
If equalization, coding, and shielding techniques are applied to copper channels, then signal quality is improved, but power consumption and device complexity increase
Solution Approach 1:
The patent eliminates the need for equalization, coding, and shielding techniques by substituting copper channels with optical waveguides. The photonic integrated circuit inherently provides signal integrity without requiring additional complexity-mitigating techniques, thereby reducing both power consumption and device complexity.
3Reliability
If equalization, coding, and shielding techniques are applied to copper channels, then signal quality is improved, but power consumption increases
Solution Approach 1:
The patent replaces energy-intensive copper channel techniques with optical transmission. Optical signals in waveguides do not radiate electromagnetic energy and do not require equalization, coding, or shielding, resulting in significantly lower power consumption while maintaining signal quality.
4Adaptability or versatility
If copper channels are used, then existing infrastructure is maintained, but scalability is limited
Solution Approach 1:
The patent designs a photonic integrated circuit that can operate in multiple modes (parallel optical fiber mode and WDM mode), providing universal functionality that adapts to different communication requirements. This multi-functionality enables scalability while maintaining reliable channel performance through optical transmission.
5Productivity
If parallel optical fiber mode is used, then scalability and reach are improved, but device complexity increases due to multiple optical paths
Solution Approach 1:
The patent combines multiple optical paths and WDM channels into a single photonic integrated circuit chip. By integrating multiple functions and optical paths on one chip, the system achieves scalability while managing device complexity through consolidation rather than separate discrete components.
Solution Approach 2:
The photonic integrated circuit is designed to support both parallel optical fiber mode and WDM mode operations, providing universal functionality that handles multiple communication protocols and configurations within a single device, thereby managing complexity while enhancing scalability.
6Productivity
If WDM mode is used, then bandwidth utilization is improved, but manufacturing precision requirements increase due to wavelength control
Solution Approach 1:
The patent uses photonic integrated circuit technology with waveguides and grating couplers that provide inherent wavelength control through their physical结构设计. This approach achieves precise wavelength management for WDM operations without requiring additional complex control mechanisms, balancing bandwidth utilization with manufacturability.
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
Enables efficient and scalable optical communication by reducing signal interference and power consumption, supporting high data rates and multiple communication standards on a single chip, thus overcoming the limitations of copper data channels.
Implementation Method 1
a plurality of grating couplers formed on opposite sides of the photonics die
Implementation Method 2
Mach-Zehnder modulators
Implementation Method 3
a plurality of photodiodes coupled to the modulators
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
Methods and systems for selectable parallel optical fiber and WDM operation may include an optoelectronic transceiver integrated in a silicon photonics die. The optoelectronic transceiver may, in a first communication mode, communicate continuous wave (CW) optical signals from an optical source module to a first subset of optical couplers on the die for processing signals in optical modulators in accordance with a first communications protocol, and in a second communication mode, communicate the CW optical signals to a second subset of optical couplers for processing signals in the optical modulators in accordance with a second communications protocol. Processed signals may be transmitted out of the die utilizing a third subset of the optical couplers. First or second protocol optical signals may be received from the fiber interface coupled to a fourth subset or a fifth subset, respectively, of the optical couplers.