Thin-Disk Laser With Jet-Flow Cooling And Parabolic Reflectors
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Solution Overview
Problem
Traditional rod solid state lasers face limitations in lateral pump and cooling methods, leading to thermal lens effects and reduced laser beam quality, while thin-disk solid state lasers with inclined crystal positions suffer from low pump efficiency and complex mechanical structures.
Innovation Solution
A laser design incorporating a semiconductor laser stack group, beam compositor, pump beam collimator, thin-disk laser crystal, parabolic reflectors, corrective reflector, and jet-flow impact cooling system, allowing for efficient multi-pumping, simplified mechanical structure, and high beam quality with adjustable pump light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multi-pumping technology is adopted to improve power and efficiency, then laser output power and efficiency are improved, but mechanical structure complexity and optical adjustment difficulty increase
Solution Approach 1:
The patent divides the pumping system into multiple independent semiconductor laser stacks, each capable of pumping the laser crystal from different positions. This segmentation allows each pump source to be independently controlled and optimized, achieving high total power while maintaining modular simplicity in the overall structure.
2Adaptability or versatility
If laser crystal is placed in inclined position to enable multi-pumping, then multi-pumping capability is achieved, but pump light efficiency decreases and resonant cavity adjustment becomes difficult
Solution Approach 1:
The patent transitions from a single-dimensional inclined crystal configuration to a multi-dimensional arrangement where multiple pump beams approach the laser crystal from different spatial positions and angles. This dimensional expansion allows all pump beams to effectively couple into the crystal without requiring the crystal itself to be inclined, thereby maintaining high pump light efficiency while achieving multi-pumping capability.
3Temperature
If SMD technology is used to connect laser crystal with cooling system, then cooling capability is achieved, but design difficulty and heat transfer efficiency decrease
Solution Approach 1:
The patent replaces the complex SMD (Surface Mount Device) mechanical connection technology with a direct thermal contact cooling system. The laser crystal is thermally coupled to the cooling system through direct contact between the crystal substrate and cooling elements, eliminating the need for intermediate SMD structures. This substitution simplifies the design and manufacturing process while improving heat transfer efficiency through direct thermal pathways.
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 achieves high pump efficiency, reduced complexity in beam shaping, and improved cooling efficiency, enabling high-power, high-quality laser output with a simpler mechanical structure and flexible resonant cavity configurations.
Implementation Method 1
a jet-flow impact cooling system, wherein the jet-flow impact cooling system is used for the cooling of the thin-disk laser crystal
Implementation Method 2
The first and second parabolic reflectors with the same facial contour function are placed with the same conjugated axis and one of the reflectors has a vertex on the focus of the other
Data Source
AI summary
A laser including a semiconductor laser stack group, a beam compositor, a pump beam collimator, a thin-disk laser crystal, a first and a second parabolic reflectors with the same facial contour function, a corrective reflector, an output mirror, and a jet-flow impact cooling system. The thin-disk laser crystal and the output mirror form a laser resonant cavity. The first parabolic reflector, second parabolic reflector, thin-disk laser crystal, and corrective reflector form a multi-pumping focus cavity. The jet-flow impact cooling system is used for cooling the thin-disk laser crystal. The pump light produced by the semiconductor laser stack group is composited by the beam compositor, collimated by the pump light collimator, and enters the multi-pumping focus cavity. Within the multi-pumping focus cavity, the pump light is focused, collimated, and deflected to converge on the thin-disk laser crystal. The laser resonant cavity produces and outputs a laser beam.