Compact CO2 Slab-Laser Integrated Housing Design
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Solution Overview
Problem
Current RF energized CO2 gas-discharge lasers have complex and bulky packaging arrangements that hinder integration into larger systems due to separate enclosures for RF power supply, impedance-matching network, and laser tube, leading to increased size, complexity, and RF/optical losses.
Innovation Solution
A compact packaging arrangement using a custom aluminum extrusion with integrated coolant passages, electrode-cooling tubes, and a single coolant circuit that combines the RFPS, impedance-matching network, and electrode assembly, eliminating the need for insulated feed-throughs and reducing the number of enclosures, thereby minimizing size and complexity while maintaining hermetic sealing and efficient cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate enclosures are used for RFPS, impedance-matching network, and laser tube, then each component can be independently cooled and maintained, but the overall system size and complexity increase
Solution Approach 1:
The patent combines the RFPS, impedance-matching network, and laser tube into a single integrated hermetically sealed enclosure, eliminating the need for multiple separate enclosures and their associated interconnections, thereby reducing packaging complexity while maintaining component functionality
Solution Approach 2:
The single enclosure serves multiple functions: it houses all three subsystems, provides hermetic sealing for the laser tube, acts as a ground reference, and incorporates integrated coolant passages for thermal management, thereby reducing the overall number of components needed
2Object-affected harmful factors
If separate enclosures with heavy shielding are used, then RF interference is prevented, but the system size and manufacturing cost increase
Solution Approach 1:
By consolidating all RF-generating and RF-sensitive components within a single hermetically sealed enclosure, the patent eliminates the need for additional external shielding structures, simplifying manufacturing while maintaining RF interference prevention through proper internal layout and grounding
3Reliability
If multiple enclosures are used, then component isolation is achieved, but RF and optical losses increase due to interconnecting cables
Solution Approach 1:
The patent eliminates the need for interconnecting coaxial cables between separate enclosures by integrating all components within a single enclosure, thereby eliminating RF and optical losses associated with cable connections while maintaining proper component isolation through internal design
4Device complexity
If a compact integrated design is used, then system size and complexity are reduced, but hermetic sealing and cooling efficiency become more difficult to maintain
Solution Approach 1:
The patent achieves hermetic sealing by designing a single integrated enclosure with sealed interfaces for the laser tube and electrode assemblies, incorporating coolant passages directly into the enclosure structure, thereby maintaining sealing integrity and cooling efficiency while achieving compact integration
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 results in a more compact and integrated CO2 slab-laser system with reduced RF and optical losses, improved cooling efficiency, and cost savings by integrating components into a single, hermetically sealed housing, facilitating easier integration into larger apparatus while maintaining high performance.
Implementation Method 1
The coolant-circuit is arranged such that coolant fluid delivered into the coolant input flows, in sequence, through the metal housing extrusion; through the electrodes, and through the metal mounting plate of the RFPS before exiting the coolant circuit via the coolant output
Data Source
Figure 1~2
Figure 3
Figure 4A
AI summary
A compact C02 slab-laser is contained in a fluid cooled housing (40) having three compartments (46, 48, 50). One compartment (48) houses discharge electrodes (70, 71) and a laser resonator. Another compartment (48) houses a radio-frequency power supply (RFPS) assembled on a fluid-cooled chill plate (82) and an impedance- matching network. The remaining compartment (50) houses beam- conditioning optics including a spatial filter (290, 340). The housing (40) and RFPS chill-plate (82) are on a common coolant-fluid circuit having a single input (214, 259) and a single output (216, 272). The spatial filter (290, 340) is optionally fluid-coolable on the common coolant fluid circuit.