Multicore Optical Fiber Amplifier With Residual Pump Light Feedback
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Solution Overview
Problem
Optical fiber amplifiers face challenges in efficiently managing power consumption and signal transmission bandwidth, particularly in varying traffic conditions, where automatic power control and gain control are necessary to maintain optimal output levels without constant power consumption.
Innovation Solution
An optical fiber amplifier system with a multicore optical fiber, a pumping light source, and a control method that combines pumping light with optical signals in a clad, allowing for the collection and monitoring of residual pumping light to adjust pumping light output levels dynamically, reducing power consumption and maintaining signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pumping light output is increased to maintain signal quality in wide bandwidth conditions, then signal transmission quality is improved, but power consumption increases
Solution Approach 1:
The patent implements a feedback control mechanism where residual pumping light that has passed through the optical fiber is monitored by a photodetector. The control unit adjusts the pumping light source output based on the monitored residual light level, creating a closed-loop system that automatically maintains optimal signal quality while minimizing power consumption. This resolves the contradiction by dynamically adjusting power output rather than operating at constant high power.
Solution Approach 2:
The system transitions from static constant power operation to dynamic power adjustment. The pumping light output is continuously varied based on actual transmission conditions and residual light monitoring, allowing the system to adapt power consumption to actual signal quality requirements rather than maintaining fixed high-power operation.
2Use of energy by moving object
If pumping light output is decreased to reduce power consumption in narrow bandwidth conditions, then power consumption is reduced, but signal transmission quality deteriorates
Solution Approach 1:
The feedback control mechanism monitors residual pumping light levels and automatically adjusts the pumping light source output to maintain adequate signal quality. Even at lower power consumption levels, the system ensures minimum signal quality thresholds are met by dynamically optimizing the pumping light output based on actual transmission conditions.
Solution Approach 2:
The system changes the pumping light output parameter dynamically based on bandwidth conditions and monitored residual light levels. Rather than operating at fixed power levels, the pumping light intensity is adjusted to match actual transmission requirements, preventing both over-powering and under-powering scenarios.
3Use of energy by moving object
If automatic power control is implemented to vary output according to bandwidth, then power consumption efficiency is improved, but device complexity increases
Solution Approach 1:
The patent employs a feedback control system consisting of a photodetector for monitoring residual pumping light and a control unit for adjusting the light source. This relatively simple feedback loop enables automatic power consumption optimization without requiring complex control algorithms or multiple sensing mechanisms.
Solution Approach 2:
The system performs self-adjustment of pumping light output based on its own residual light monitoring. The optical fiber amplifier automatically regulates its own power consumption by using its transmitted pumping light as the monitoring signal, eliminating the need for external complex control systems.
4Use of energy by moving object
If residual pumping light is monitored to control output levels, then power consumption is optimized, but measurement precision requirements increase
Solution Approach 1:
The patent uses residual pumping light itself as an intermediary indicator of amplifier performance and power efficiency. By monitoring this naturally present light rather than directly measuring complex parameters like signal quality or power consumption, the system achieves optimization with relatively simple photodetector-based measurement.
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 achieves low power consumption and high power use efficiency while preventing signal quality degradation, enabling cost-effective and efficient operation in varying bandwidth conditions.
Implementation Method 1
an optical fiber amplifier that inputs pumping light being output from a pumping light source to a rare-earth-ion-doped fiber to which an optical signal is input, and thereby amplifies a signal intensity of the optical signal
Data Source
AI summary
Provided are a low-cost and low power-consumption optical fiber amplifier, an optical fiber amplifier control method, and a transmission system. The optical fiber amplifier comprises: an optical fiber to which pumping light is supplied and which amplifies an optical signal, the optical fiber including a plurality of cores in a cladding; a light source which outputs the pumping light; a combining means which supplies the pumping light from the light source to the cladding of the optical fiber and causes the pumping light to be combined with the optical signal; a collect means which collects, without collecting the signal light, pumping light among the supplied pumping light that has not been absorbed by the optical fiber; a monitor means which monitors residual pumping light that has passed through the optical fiber and collected by the collect means; and a control means which controls the state of the pumping light.