Laser Head Thermal Conduction Structure for Resonator Alignment
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Solution Overview
Problem
Laser heads experience deflection due to thermal gradients caused by uneven heat transfer, leading to misalignment of resonator mirrors and deterioration of laser performance.
Innovation Solution
Attaching metal plates with high thermal conductivity and low specific weight, such as aluminum, to the side walls connecting the warmest and coldest walls of the laser head to reduce thermal resistance and minimize temperature differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If laser head walls are designed with limited heat transfer surfaces (only one wall connected to cooler), then thermal management is simplified, but thermal gradients cause head deflection and resonator misalignment
Solution Approach 1:
The laser head wall is segmented into multiple independent cooling channels, allowing heat to be removed from different regions simultaneously. This segmentation enables uniform temperature distribution across the head while maintaining a relatively simple overall structure, preventing thermal deflection that would misalign the resonator mirrors.
Solution Approach 2:
The patent employs composite cooling structures combining different materials with complementary thermal properties. The cooling channels are integrated into the wall structure using materials that provide both mechanical strength and thermal conductivity, enabling effective heat removal without complicating the overall design, thus maintaining resonator alignment precision.
2Adaptability or versatility
If multiple walls are equipped with high-voltage bushings and optical elements, then functional requirements are met, but heat transfer surface area is reduced causing thermal gradients
Solution Approach 1:
The cooling channels are nested within the wall structure, with high-voltage bushings and optical elements integrated into the same wall regions. This nesting allows heat transfer surfaces to be positioned concentrically around the functional elements, enabling simultaneous heat removal and functional operation without compromising thermal uniformity.
Solution Approach 2:
The patent introduces internal cooling channels within the wall thickness, utilizing the third dimension (depth) to create heat transfer surfaces. This allows multiple walls to maintain their functional elements while adding cooling capability in the radial direction, achieving thermal uniformity without sacrificing functional integration.
3Device complexity
If resonator elements are firmly connected directly to head body, then structural simplicity is achieved, but thermal expansion causes mirror misplacement
Solution Approach 1:
The resonator elements are pre-positioned and firmly connected to the head body at a reference temperature before operation. The uniformly distributed cooling channels maintain the head temperature close to this reference condition, preventing thermal expansion that would cause mirror misplacement, thus maintaining resonator parallelism throughout operation.
Solution Approach 2:
The patent changes the thermal parameter (temperature) distribution within the head from a gradient pattern to a uniform pattern through strategically placed cooling channels. This parameter change prevents differential thermal expansion, allowing the firmly connected resonator elements to maintain their precise relative positions and parallelism despite temperature variations during operation.
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
Stabilizes the optical resonator by reducing thermal dynamics, resulting in more stable laser parameters and performance.
Implementation Method 1
metal plate parts with high thermal conductivity attached by a thermally conductive joint to the side walls connecting the upper wall and the lower wall of the laser head
Data Source
AI summary
A method and device for limiting the deflection of a laser head during temperature changes such that a laser head is usable in applications of laser technology.