Blue Laser Assembly With Oxygen-Controlled Cavity for Beam Stability
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Solution Overview
Problem
Infrared-based high power laser systems for additive manufacturing suffer from limitations in build volume and speed due to shortcomings in beam quality and reliability, particularly in the UV spectrum, which are not adequately addressed by existing technologies.
Innovation Solution
A high power, high brightness solid-state laser assembly with an isolated internal cavity, free from silicon-based contaminants, using a combination of diode laser devices and optics to maintain beam quality and prevent SiO2 buildup, with an oxygen-rich environment to avoid carbon deposits, ensuring a degradation rate of 2.3% per 1000 hours or less.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If infrared laser systems are used for additive manufacturing, then manufacturing capability is provided, but build volume and build speed are limited due to beam quality degradation
Solution Approach 1:
The patent changes the wavelength parameter from infrared to blue laser (405-495 nm) to achieve better material absorption and beam quality maintenance. This parameter change enables higher productivity while maintaining beam quality stability over extended periods, directly resolving the contradiction between build speed and beam quality reliability
Solution Approach 2:
The patent implements an inert or controlled atmosphere environment within the laser system to prevent oxidation and contamination of optical components. This creates a stable environment that maintains beam quality over time, enabling sustained high-speed manufacturing without degradation, thus resolving the reliability aspect of the contradiction
2Productivity
If high power laser operation is maintained over extended periods, then productivity is improved, but SiO2 buildup and carbon deposits degrade beam quality
Solution Approach 1:
The patent extracts and removes silicon-based contaminants and carbon deposit sources from the laser system environment. By taking out these harmful elements through careful material selection and environmental control, the system maintains beam quality consistency during continuous high-power operation, enabling both high productivity and reliability
Solution Approach 2:
The patent converts the potential harm of high-power operation by implementing protective measures such as oxygen-scavenging materials and controlled atmosphere that transform the harsh operating conditions into a stable environment. This allows continuous operation at high power while preventing the formation of degrading deposits, maintaining beam quality over time
3Manufacturing precision
If blue laser wavelength is used instead of infrared, then material absorption and beam quality are improved, but system complexity increases
Solution Approach 1:
The patent merges the laser source, optical components, and atmospheric control systems into an integrated blue laser system. By combining these elements into a unified design optimized for blue wavelength operation, the system achieves high manufacturing precision while managing complexity through integration rather than separate components, making the advanced technology practically implementable
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 solution provides a reliable, high-quality blue laser beam with extended lifetime, maintaining power and beam parameters over long periods without significant degradation, suitable for industrial applications such as welding and additive manufacturing.
Implementation Method 1
a solid-state device for propagating a laser beam from a propagation surface of the solid-state device along a laser beam path
Implementation Method 2
whereby during operation of the solid-state device CO2 is created within the internal cavity from carbon based contaminates
Data Source
AI summary
There are provided high power, high brightness solid-state laser systems that maintain initial beam properties, including power levels, and do not have degradation of performance or beam quality, for at least 10,000 hours of operation. There are provided high power, high brightness solid-state laser systems containing Oxygen in their internal environments and which are free from siloxanes.