Optical Receiver Circuit for AC Power and Data Separation
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Solution Overview
Problem
Existing optical receiving devices struggle to effectively separate and process both the informational content and parametric information, such as AC power, from optical signals, leading to inefficiencies in signal processing and data transmission.
Innovation Solution
An optical receiving device is designed with a photodiode to conduct current based on optical power, RF gain circuitry to generate analog electrical signals, and a power detector to isolate AC power, while also including an amplifier to generate a digital signal representing informational content, enabling the separation and preservation of both signal types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing optical receiving devices process optical signals, then signal transmission occurs, but the separation and processing of informational content and parametric information is inefficient
Solution Approach 1:
The patent divides the optical signal processing into separate functional paths: one path extracts informational content while another path extracts parametric information (AC power). This segmentation allows each path to be optimized independently, improving overall processing efficiency while preventing information loss through dedicated extraction mechanisms for each signal component.
2Power
If RF gain circuitry amplifies the optical signal, then signal strength increases, but precise detection of AC power becomes more difficult
Solution Approach 1:
The patent extracts AC power information from the signal path before it enters the RF gain circuitry through a dedicated power detector. By taking out the parametric information measurement before amplification, the system maintains precise AC power detection capability while still benefiting from signal strength enhancement in the main information processing path.
Solution Approach 2:
The patent introduces a power detector as an intermediary component that measures AC power by sampling the signal at a specific point in the circuit. This intermediary measurement mechanism allows precise AC power detection to coexist with RF gain amplification, as the power detector captures the parametric information before it is affected by the amplification process.
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 solution allows for precise detection and output of AC power and informational content, enhancing signal processing efficiency and data transmission accuracy by utilizing RF gain circuitry and power detection mechanisms.
Implementation Method 1
a photodiode to receive an optical signal, where the photodiode is configured to conduct a current that is based on an optical power of the optical signal
Data Source
AI summary
An example optical receiving device includes a photodiode to receive an optical signal, where the photodiode is configured to conduct a current that is based on an optical power of the optical signal, and a radio frequency (RF) gain circuitry to generate one or more analog electrical signals based on the current and based on gain provided by the RF gain circuitry. A power detector is configured to receive an analog electrical signal of the one or more analog electrical signals, to detect alternating current (AC) power of the optical signal based on the analog electrical signal, and to output a signal representing the AC power based on the detecting.