Power Over Fiber System Temperature Control
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Solution Overview
Problem
In power over fiber systems, surplus electric energy is often lost as heat due to constant feed light supply to optical receivers, even when power consumption is reduced.
Innovation Solution
A power over fiber system that includes a semiconductor laser for generating feed light, a photoelectric conversion element for converting feed light to electric power, an optical fiber for transmitting the feed light, a temperature sensor to detect the photoelectric conversion element's temperature, and a controller that adjusts the output level of the feed light based on temperature thresholds to optimize energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If feed light is supplied at constant output to optical receiver, then power supply stability is improved, but energy loss increases when power consumption is reduced
Solution Approach 1:
The patent applies dynamics by transitioning from constant output feed light supply to variable output control. The semiconductor laser's output level is dynamically adjusted based on real-time temperature feedback from the optical receiver, allowing the system to adapt power supply levels to actual operational needs and reduce energy waste while maintaining stability.
Solution Approach 2:
The patent implements feedback control by using a temperature sensor to detect the optical receiver's temperature and feeding this information back to the controller. The controller then adjusts the semiconductor laser's output accordingly, creating a closed-loop system that optimizes energy efficiency while maintaining power supply stability.
2Reliability
If feed light output is increased to ensure power supply, then power supply reliability is improved, but temperature of photoelectric conversion element increases
Solution Approach 1:
The feedback mechanism monitors temperature continuously and adjusts feed light output to maintain reliable power supply within safe temperature limits. When temperature approaches thresholds, the system automatically reduces output, preventing overheating while ensuring adequate power delivery under normal conditions.
Solution Approach 2:
The system changes the output parameter of the semiconductor laser based on temperature conditions. By adjusting the light output level dynamically according to temperature parameters, the system maintains power supply reliability while preventing excessive temperature rise in the photoelectric conversion element.
3Loss of energy
If temperature monitoring and control is added, then energy efficiency is improved, but device complexity increases
Solution Approach 1:
The system achieves self-service by using the optical receiver's own temperature sensor to monitor its condition and automatically adjusting the power supply accordingly. This self-monitoring and self-regulation capability improves energy efficiency without requiring complex external control systems, as the receiver essentially controls its own power needs through the feedback loop.
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 system reduces energy loss by dynamically adjusting the feed light output level according to the temperature of the photoelectric conversion element, maintaining efficient power supply and preventing overheating, thereby enhancing overall energy efficiency and extending the lifespan of the components.
Implementation Method 1
an optical transmitter that transmits signal light modulated with an electric signal and feed light for supplying electric power
Implementation Method 2
an optical receiver that operates with electric power obtained by converting the feed light transmitted through the first cladding of the optical fiber
Data Source
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AI summary
A power over fiber system 1 includes: a power sourcing equipment 110 including a semiconductor laser 111 that oscillates with electric power, thereby outputting feed light 112; a powered device 310 including a photoelectric conversion element 311 that converts the feed light 112 from the power sourcing equipment 110 into electric power; an optical fiber cable 200 that transmits the feed light 112 from the power sourcing equipment 110 to the powered device 310; and a temperature sensor 312 that detects a temperature of the photoelectric conversion element 311, wherein a process of lowering an output level of the feed light 112 is performed in response to the temperature detected by the temperature sensor 312 being equal to or higher than a predetermined threshold value, and a process of raising the output level of the feed light 112 is performed in response to the detected temperature being lower than the predetermined threshold value.