VCSEL Active Optical Cable Architecture for Lower-Power AI Links
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Solution Overview
Problem
The high cost and high power consumption of electro-absorption modulated laser and directly modulated laser single-mode optical modules used in active optical cables for high-speed data transmission in artificial intelligence applications are significant challenges.
Innovation Solution
The use of a multi-mode optical module with vertical cavity surface emitting laser (VCSEL) circuits and signal-splitting processors in active optical cable systems to convert electric signals into optical signals and vice versa, employing a VCSEL laser driver to reduce costs and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If electro-absorption modulated laser or directly modulated laser single-mode optical modules are used for high-speed data transmission, then data transmission capability is improved, but cost and power consumption increase
Solution Approach 1:
The patent changes the fundamental parameter of the laser type from single-mode (EML/DML) to multi-mode (VCSEL), which fundamentally alters the operating characteristics. This parameter change enables lower power consumption and reduced cost while maintaining high-speed transmission capability through the multi-mode fiber and signal processing architecture.
Solution Approach 2:
The patent segments the signal transmission into multiple lanes (M lanes at transmitting end, N lanes at receiving end) and uses signal-splitting processors to distribute and process signals across these lanes. This segmentation allows the system to achieve high aggregate throughput while using more efficient VCSEL modules that consume less power per lane.
2Speed
If electro-absorption modulated laser or directly modulated laser single-mode optical modules are used for high-speed data transmission, then data transmission capability is improved, but cost increases
Solution Approach 1:
The patent changes the laser type parameter from expensive single-mode (EML/DML) to more cost-effective multi-mode (VCSEL) lasers. This parameter change significantly reduces manufacturing cost while maintaining the required data transmission speed through the multi-mode fiber and distributed signal processing architecture.
Solution Approach 2:
The patent employs VCSEL modules which are generally more cost-effective and readily available compared to specialized EML or DML single-mode modules. By using these more economical laser components, the system achieves high-speed transmission at a lower cost.
3Adaptability or versatility
If M transmitting-end lanes and N receiving-end lanes are used with M ≠ N, then adaptability to different devices is improved, but device complexity increases
Solution Approach 1:
The patent implements universal adaptability by allowing the number of transmitting-end lanes (M) and receiving-end lanes (N) to be different, enabling the same active optical cable system to connect diverse devices with varying interface requirements. The signal-splitting processors are designed to handle variable lane configurations, providing multi-functionality across different application scenarios.
Solution Approach 2:
The system dynamically adapts to different lane configurations through the signal-splitting processors that can flexibly manage M input lanes and produce N output lanes. This dynamic signal distribution capability allows the system to adapt to varying device requirements without requiring fixed hardware configurations.
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 the cost and power consumption of active optical cable systems while maintaining high-speed data transmission capabilities.
Implementation Method 1
a transmitting-end vertical cavity surface emitting laser circuit and a receiving-end vertical cavity surface emitting laser circuit
Implementation Method 2
The transmitting-end vertical cavity surface emitting laser circuit is connected to the receiving-end vertical cavity surface emitting laser circuit through the optical fiber
Data Source
AI summary
An active optical cable system is applied to a transmitting-end electronic apparatus and a receiving-end electronic apparatus. The active optical cable system includes an active optical cable transmitting apparatus, an active optical cable receiving apparatus, and an optical fiber. The active optical cable transmitting apparatus includes a transmitting-end signal-splitting processor and a transmitting-end vertical cavity surface emitting laser circuit. The active optical cable receiving apparatus includes a receiving-end signal-splitting processor and a receiving-end vertical cavity surface emitting laser circuit. The transmitting-end vertical cavity surface emitting laser circuit is connected to the receiving-end vertical cavity surface emitting laser circuit through the optical fiber.