Laser Device Heat Dissipation via Cladding Element
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Solution Overview
Problem
Laser devices using phosphate glass as laser-active material face challenges with heat dissipation, chemical resistance, and climate resistance, leading to inefficiencies and reduced service life due to heat generation and hygroscopic properties.
Innovation Solution
A laser device design incorporating a cladding element with a phosphate crown glass or borosilicate crown glass, which has a lower absorption coefficient for pump light, allowing for effective heat conduction and improved chemical and climate resistance, ensuring undisturbed laser light guidance and enhanced thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If phosphate glass is used as laser-active material, then laser efficiency is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The laser device is segmented into distinct functional zones: the phosphate glass laser-active material core and surrounding cladding elements made of different glass materials. This segmentation allows the core to optimize for laser efficiency while the cladding elements manage heat dissipation, resolving the contradiction between laser efficiency and heat dissipation capability.
Solution Approach 2:
Different regions of the laser device are assigned different material properties: the central laser-active material uses phosphate glass for high laser efficiency, while the peripheral cladding elements use glasses with different thermal and optical properties optimized for heat management. This local differentiation allows simultaneous optimization of laser efficiency and heat dissipation in different spatial zones.
2Use of energy by moving object
If phosphate glass is used as laser-active material, then laser efficiency is improved, but chemical resistance deteriorates
Solution Approach 1:
Cladding elements made of chemically resistant glass materials serve as intermediary protective layers between the phosphate glass laser-active material and the external environment. These cladding elements maintain chemical resistance while allowing the phosphate glass core to achieve high laser efficiency, thus resolving the contradiction between laser efficiency and chemical resistance.
3Use of energy by moving object
If phosphate glass is used as laser-active material, then laser efficiency is improved, but climate resistance deteriorates
Solution Approach 1:
The cladding elements act as intermediary protective barriers that shield the phosphate glass laser-active material from environmental climate factors such as moisture and temperature variations. This intermediary structure allows the device to maintain high laser efficiency while improving overall climate resistance through the protective cladding layers.
4Temperature
If cladding element with lower pump light absorption is used, then heat conduction is improved, but pump light absorption deteriorates
Solution Approach 1:
The device is segmented into the laser-active material core that absorbs pump light and generates laser output, and the cladding elements with lower pump light absorption that primarily function for heat conduction. This segmentation ensures that pump light absorption is concentrated in the necessary core region while heat conduction is optimized in the cladding regions, resolving the contradiction between heat conduction and pump light absorption.
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 improved heat dissipation, chemical resistance, and climate resistance, maintaining laser efficiency and extending the service life of the device by effectively managing heat and protecting against environmental influences.
Implementation Method 1
heat exchange by thermal conduction is enabled between the cladding element and the element made of laser-active material
Implementation Method 2
the absorption coefficient for the pump light in the cladding element is lower than the corresponding absorption coefficient of the element made of laser-active material, and wherein the laser device is configured such that the pump light is guided through the cladding element into the element made of laser-active material
Data Source
Figure 1~2
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Figure 5~6
AI summary
The object of the invention is to provide a laser device in which improved heat dissipation is achieved from a laser-active material, in particular a phosphate glass. For this purpose, the laser device (1) comprises an element (3) made of laser-active material which emits laser light (Y) when excited by pump light (X), wherein the laser-active material is a glass, and wherein at least one cladding element (5, 7) is connected to the element (3) made of laser-active material, so that heat exchange by thermal conduction is enabled between the cladding element (5, 7) and the element (3) made of laser-active material, and wherein the glasses of the cladding element (5, 7) and the element (3) made of laser-active material differ such that the absorption coefficient for the pump light (X) of the cladding element (5, 7) is lower than the corresponding absorption coefficient of the element (3) made of laser-active material.and wherein the laser device (1) is configured such that the pump light (X) can be guided through the cladding element (5, 7) into the element (3) made of laser-active material and/or that the pump light (X) can be guided through the element (3) made of laser-active material into the cladding element (5, 7).