Laser Diode Packaging Oxygen Atmosphere Contamination
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Solution Overview
Problem
High power laser systems, particularly those in the UV, blue, and green wavelength ranges, face issues with short lifetimes and rapid degradation of beam quality due to contamination from carbon and silicon-based materials, leading to inefficiencies and safety concerns in applications like additive manufacturing and materials processing.
Innovation Solution
The implementation of a sealed container packaging system that eliminates silicon-based contaminants and uses an oxygen-rich environment to convert carbon-based contaminants into CO2, preventing the formation of SiO2 and Carbon deposits, thereby maintaining beam quality and extending the operational life of laser diodes to at least 5,000 hours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If laser systems operate in environments with carbon and silicon-based materials, then they can perform materials processing and additive manufacturing functions, but beam quality degrades rapidly due to contamination and SiO2 formation
Solution Approach 1:
The patent extracts and removes silicon-based contaminants from the laser beam path environment. By eliminating silicon sources from the sealed housing, the system prevents SiO2 formation on optical surfaces, thereby maintaining beam quality and extending laser system lifetime.
Solution Approach 2:
The patent creates an inert or controlled atmosphere within the sealed housing to prevent chemical reactions between carbon-based contaminants and oxygen that would form degrading deposits. This controlled environment isolates the laser beam path from reactive contaminants, maintaining optical surface cleanliness and beam quality over extended operation.
2Ease of manufacture
If conventional packaging is used for laser diodes, then assembly is simpler, but carbon and silicon contaminants rapidly degrade beam quality within 100-1000 hours
Solution Approach 1:
The patent performs preliminary cleaning and preparation of the housing interior surfaces to remove silicon-based contaminants before assembly. It also pre-installs filters and establishes the controlled atmosphere environment before the laser diode is operated, preventing contaminant accumulation that would otherwise rapidly degrade beam quality.
Solution Approach 2:
The patent introduces filters as intermediary components between the laser diode and the external environment. These filters capture carbon-based contaminants and prevent them from reaching and degrading optical surfaces, thereby maintaining beam quality without requiring complete elimination of all potential contaminant sources.
3Productivity
If high power laser beams are used for additive manufacturing and materials processing, then productivity increases, but contamination from processing materials accelerates beam quality degradation
Solution Approach 1:
The patent segments the laser system into a sealed housing that isolates the critical beam path from the external manufacturing environment. This segmentation allows high power laser operation for productive manufacturing while preventing processing material contaminants from entering and degrading the beam quality.
Solution Approach 2:
The patent uses filters as intermediary components that capture carbon-based contaminants generated during high power laser processing. These filters are positioned in the beam path to intercept contaminants before they can deposit on optical surfaces, enabling sustained high productivity operation while maintaining beam quality.
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
This approach results in high-quality, high-brightness laser beams with minimal degradation (2.3% per 1,000 hours or less), ensuring reliable operation and reducing maintenance costs by maintaining at least 80% of nominal power and beam parameter product over extended periods.
Implementation Method 1
uses an oxygen-rich environment to convert carbon-based contaminants into CO2
Implementation Method 2
The implementation of a sealed container packaging system that eliminates silicon-based contaminants
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.