Fiber Laser Current Balancing to Suppress Stokes Oscillation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fiber laser systems are prone to failure due to variance in laser beam power among individual units, leading to Stokes oscillation, which cannot be effectively restricted by existing control methods.
Innovation Solution
A fiber laser system with a control section that adjusts the driving current strength for each excitation light source to minimize power differences between laser beams, using coefficients based on sudden-death numbers to maintain consistent output power and prevent failures from Stokes oscillation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fiber laser units operate with high individual power output, then productivity increases, but variance in power among units causes Stokes oscillation and system failure
Solution Approach 1:
The control section dynamically adjusts the driving current parameters supplied to each excitation light source based on real-time power measurements. By changing the electrical parameters (current strength) rather than physical structure, the system balances power output across all fiber laser units, preventing Stokes oscillation while maintaining high productivity
Solution Approach 2:
The system implements a closed-loop feedback mechanism where power measurement sections continuously monitor the power of laser beams from each fiber laser unit. The control section receives this feedback and adjusts driving currents accordingly, creating a self-regulating system that maintains power balance and prevents system failure
2Productivity
If driving current strength is increased to boost laser beam power, then productivity improves, but power variance among units increases leading to Stokes oscillation
Solution Approach 1:
The control section independently adjusts the driving current parameters for each excitation light source based on measured power levels. Units producing excessive power receive reduced current, while units producing insufficient power receive increased current, thereby maintaining consistent power output across all units and preventing Stokes oscillation
Solution Approach 2:
Each fiber laser unit receives customized driving current parameters tailored to its specific performance characteristics. Rather than applying uniform current settings, the system optimizes local parameters for each unit based on its individual power output, ensuring overall system consistency while maintaining high productivity
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 effectively restricts variance in laser beam power, reducing the likelihood of failures caused by Stokes oscillation and ensuring consistent output power close to a target value.
Implementation Method 1
a combiner (OC) that combines laser beams generated by the respective plurality of fiber laser units
Implementation Method 2
the power of the laser beam generated by each fiber laser unit is determined according to the strength of a driving current that drives an excitation light source included in the fiber laser unit
Data Source
AI summary
A fiber laser system including: fiber laser units each including an excitation light source; a combiner that combines laser beams generated by the respective fiber laser units; and a controller that controls strength of a driving current supplied to each of the excitation light sources and reduces a difference in power between the respective laser beams.