Optic Signal Power Control with Environmental Compensation
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Solution Overview
Problem
Optical signal generators in varying environmental conditions, such as temperature changes and device aging, face challenges in maintaining precise operation, leading to errors and reduced payload data throughput.
Innovation Solution
A method and apparatus for controlling optic signal power using a combination of open loop and closed loop control systems, incorporating temperature and timer modules, as well as feedback loops, to monitor and adjust the signal power levels, ensuring optimal performance despite environmental and aging-related changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical signal generators operate in varying environmental conditions without compensation, then device complexity is reduced, but operational reliability deteriorates due to temperature variation and aging effects
Solution Approach 1:
The patent implements feedback loops that continuously monitor optical signal power and generate compensation values to adjust the signal generator output. The system measures actual optical power, compares it to target values, and applies corrective feedback to maintain reliable operation despite environmental variations and aging effects.
Solution Approach 2:
The patent applies preliminary compensation actions by pre-calculating and applying correction values before significant performance degradation occurs. Temperature compensation and aging compensation are proactively implemented based on predicted environmental conditions and device age, preventing reliability issues before they manifest.
2Measurement precision
If compensation mechanisms are added to account for temperature and aging, then measurement precision of optical signal power is improved, but device complexity increases
Solution Approach 1:
The patent segments the compensation function into distinct modular components: temperature compensation module, aging compensation module, and feedback control module. Each module handles a specific aspect of compensation, allowing for independent optimization and maintenance while achieving comprehensive measurement precision through their coordinated operation.
3Adaptability or versatility
If open loop control with temperature and timer modules is used, then adaptability to environmental changes is improved, but control precision over actual signal power may be insufficient
Solution Approach 1:
The patent merges open-loop compensation mechanisms (temperature and timer modules) with closed-loop feedback control into a unified system. The open-loop modules provide adaptive pre-compensation for environmental changes, while the feedback loop fine-tunes the control based on actual measured signal power, achieving both adaptability and precision through combination.
4Measurement precision
If closed loop feedback system monitors photodetector current to control power level, then control precision is improved, but device complexity and energy consumption increase
Solution Approach 1:
The feedback monitoring operates periodically rather than continuously, measuring photodetector current at scheduled intervals to generate compensation adjustments. This periodic operation maintains control precision by regularly updating compensation values while reducing energy consumption by keeping the monitoring circuit inactive between measurement cycles.
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 approach ensures highly accurate and dynamic control of optic signal power, maintaining optimal output levels and preventing errors, thereby increasing circuit uptime and reliability.
Implementation Method 1
the photodetector current or optic signal generator current may be monitored, such as in a closed loop feedback system to control the power level of the optic signal
Data Source
AI summary
A method and apparatus is disclosed for optic signal power control to maintain a desired or optimum optic signal power level. During start-up, a default or target value from memory may be utilized to bias or otherwise control operation of an optic signal generator or driver. During operation, pre-stored values may continue to be utilized or an open loop or closed loop control system may be utilized. An open loop control system may incorporate a temperature module or a timer module to account for changes in environment or changes due to aging that may undesirably affect system operation. A closed loop control system may incorporate one or more feedback loops that generate a compensation value to account for detected changes. In one configuration one or more peak values of the actual optic signal, or a portion thereof, are detected and processed to generate the compensation signal.