Multi-Wavelength Laser Driving With Feedback-Based Wavelength Switching
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Solution Overview
Problem
Traditional lasers face inefficiencies in processing materials like copper and aluminum due to poor absorptivity, necessitating high power levels, which can be addressed by employing multi-wavelength laser systems with controlled switching mechanisms.
Innovation Solution
A multi-wavelength laser system with a controller, light source drivers, and feedback circuits to manage dual or multiple laser sources with different wavelength ranges, allowing for controlled switching and optimized heat treatments based on material absorptivity changes at varying temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional single-wavelength laser is used for processing materials like copper and aluminum, then the laser power must be significantly increased to more than 10 kilowatts to process increasing material thickness, but this results in high power consumption and reduced processing efficiency due to poor material absorptivity
Solution Approach 1:
The patent segments the laser processing task into multiple wavelength stages. A blue laser (450nm) is used for initial processing where material absorptivity is higher, and an infrared laser (1064nm) is used for subsequent processing. This segmentation allows each wavelength to be optimized for specific processing conditions, avoiding the need for continuously high power levels and reducing overall energy consumption.
Solution Approach 2:
The patent changes the wavelength parameter of the laser during processing. By switching between blue (450nm) and infrared (1064nm) wavelengths based on material temperature and absorptivity characteristics, the system optimizes energy coupling efficiency at different processing stages, thereby reducing total power consumption while maintaining high productivity.
2Volume of moving object
If high laser power is used to process materials with poor absorptivity, then material thickness processing capability is improved, but processing efficiency decreases due to energy loss
Solution Approach 1:
The patent applies preliminary action by using the blue laser (450nm) first to pre-process the material surface where absorptivity is higher. This preliminary processing creates favorable conditions for subsequent infrared laser processing, enabling deeper penetration and thicker material processing while maintaining high efficiency and reducing energy loss.
Solution Approach 2:
The patent ensures continuity of useful action by seamlessly switching between blue and infrared lasers during processing. The transition between wavelengths is coordinated to maintain continuous material processing without interruption, ensuring that the useful heating action continues throughout while optimizing energy utilization at each stage.
3Productivity
If multi-wavelength laser system is implemented, then processing efficiency and power optimization are improved, but device complexity increases due to multiple laser sources and control mechanisms
Solution Approach 1:
The patent merges multiple laser sources (blue laser at 450nm and infrared laser at 1064nm) into a single integrated processing system with unified control. The controllers are coordinated to switch between wavelengths based on processing requirements, combining the functions of multiple lasers while maintaining manageable system complexity through integrated design.
Solution Approach 2:
The patent implements feedback control mechanisms where controllers monitor processing conditions and automatically adjust wavelength selection and power levels. This feedback system optimizes the coordination between multiple laser sources, managing system complexity by using intelligent control algorithms to coordinate the multi-wavelength operation based on real-time material response.
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
Enhances processing efficiency and reduces power consumption by using blue and infrared lasers sequentially, leveraging absorptivity differences at different temperatures to achieve efficient material processing.
Implementation Method 1
a feedback circuit, wherein the feedback circuit is configured to obtain a first feedback signal in response to the first driving signal from the first laser source and generate a second driving signal according to the first feedback signal
Implementation Method 2
leveraging absorptivity differences at different temperatures to achieve efficient material processing
Data Source
AI summary
A multi-wavelength laser driving device includes a controller, a first light source driver, a feedback circuit and a second laser source light source driver. The controller is configured to generate a first driving signal according to setting data, and the setting data includes a first driving period of the first laser source. A first light source driver is connected to the controller and configured to drive the first laser source according to the first driving signal. The feedback circuit is configured to obtain a first feedback signal in response to the first driving signal from the first laser source and generate a second driving signal according to the first feedback signal. The second light source driver is connected to the feedback circuit and the controller, and is configured to drive the second laser source according to the first driving period and the second driving signal.