Dynamic Photodiode Resettable Regions High-Speed Data
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Solution Overview
Problem
Current photodiodes in high-speed data communication systems, particularly those using optical fibers, face challenges in efficiently detecting light and generating electrical signals due to limitations in dynamic range and response time, leading to suboptimal performance in high-speed data transmission.
Innovation Solution
The development of a dynamic photodiode with a substrate and doped regions, including resettable doped regions and light absorbing regions, which generate electron-hole pairs in response to incident light and are controlled by specific voltage applications to enhance detection efficiency and response time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional photodiodes are used in high-speed data communication systems, then the system can detect light and generate electrical signals, but the dynamic range and response time are limited, leading to suboptimal performance
Solution Approach 1:
The photodiode is divided into multiple doped regions (first doped region, second doped region, third doped region, fourth doped region) with distinct functions. The first and second doped regions form the primary detection structure, while the third and fourth doped regions serve as resettable regions that can be independently controlled to clear accumulated charge carriers, enabling segmented functional optimization for both speed and reliability
Solution Approach 2:
The patent implements dynamic control of the photodiode through resettable doped regions that can switch between active detection mode and reset mode. By applying reset voltages to the third and fourth doped regions, the system can dynamically clear accumulated carriers to restore optimal detection performance, enabling adaptive operation that maintains high reliability across varying data transmission conditions
2Ease of manufacture
If the photodiode structure is simplified to reduce complexity, then manufacturing becomes easier, but the dynamic range and response time performance deteriorates
Solution Approach 1:
Multiple doped regions are integrated into a single monolithic photodiode structure formed on one substrate. The first, second, third, and fourth doped regions are combined in a unified device architecture that can be fabricated using standard semiconductor processing techniques, achieving complex functionality without requiring multiple discrete components or complex assembly steps
Solution Approach 2:
The doped regions serve multiple functions: the first and second doped regions provide primary light detection and signal generation, while the third and fourth doped regions provide reset capability. This multi-functional design allows a single photodiode structure to perform both detection and self-reset operations, eliminating the need for separate reset circuits or additional components
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 configuration improves the dynamic range and response time of photodiodes, enabling more efficient light detection and electrical signal generation, thereby enhancing the performance of high-speed data communication systems.
Implementation Method 1
A first light absorbing region disposed on the substrate between the first doped region and the second doped region. The first light absorbing region may generate first electron-hole pairs in the substrate.
Data Source
AI summary
According to embodiments of the present disclosure, a dynamic photodiode may include a substrate, a first doped region, a second doped region, a first resettable doped region between the first doped region and the second doped region, and a first light absorbing region between the first doped region and the second doped region. The first doped region may include a first contact that receives a first voltage. The second doped region may include a second contact that receives a second voltage. The first resettable doped region may include a first resettable contact that receives a reset voltage or is set as an open circuit. The first light absorbing region may generate first electron-hole pairs in the substrate when the first resettable contact is set as an open circuit, and the first electron-hole pairs may be removed from the substrate when the first resettable contact receives the reset voltage.