Ceramic Laser Amplifier UV Jacket for High-Energy Pulsed Output
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Laser amplification devices using single-crystal materials are limited by small cross sections and thermomechanical properties of glass matrices, resulting in either low repetition rates and high costs or high energies at limited rates and short maintenance cycles, while lamp-pumped laser ceramics face degradation from ultraviolet radiation.
Innovation Solution
A laser amplification device utilizing a ceramic YAG doped with Nd3+ ions, integrated with a jacket that absorbs UV radiation and includes a UV filter, optical diffuser, and cooling system to prevent degradation and ensure homogeneous pumping, allowing for larger cross-sectional amplification and higher energy outputs at increased repetition rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If single-crystal amplifying medium is used, then high repetition rates are achieved, but beam energy is limited to modest levels
Solution Approach 1:
The patent uses composite laser ceramics composed of multiple crystallites in a grain-boundary matrix, combining the advantages of single crystals (good thermomechanical properties, high repetition rates) with the ability to achieve large cross-sections (high beam energy). The composite structure allows energies of several tens of joules at repetition rates exceeding 10 Hz.
2Quantity of substance
If glass amplifying medium is used, then high beam energies are achieved, but repetition rate is limited to low values
Solution Approach 1:
The patent replaces glass matrices with ceramic matrices composed of crystallites separated by grain boundaries. This substitution maintains the ability to achieve large cross-sections (for high energy) while dramatically improving thermomechanical properties, enabling repetition rates exceeding 10 Hz.
3Ease of manufacture
If lamp pumping is used, then cost is reduced, but ultraviolet radiation degrades the amplifying medium
Solution Approach 1:
The patent extracts and removes the harmful ultraviolet component from the lamp spectrum by placing a UV filter in the optical path between the pumping lamps and the laser ceramic. This allows cost-effective lamp pumping while protecting the amplifying medium from UV-induced degradation and solarization.
Solution Approach 2:
The UV filter acts as an intermediary element that selectively blocks harmful UV radiation while allowing useful pumping wavelengths to pass through. This mediator protects the laser ceramic from degradation without compromising the pumping efficiency or increasing system cost significantly.
4Quantity of substance
If large cross section is achieved, then beam energy increases, but thermomechanical distortion increases
Solution Approach 1:
The patent uses composite laser ceramics with grain-boundary matrices that provide superior thermomechanical stability compared to both single crystals and glass. This allows large cross-sections (for high energy) to be achieved while maintaining stability and minimizing distortion at high repetition rates.
Solution Approach 2:
The patent changes the material parameters by transitioning from glass or single-crystal matrices to ceramic matrices with controlled grain structure. This parameter change improves thermomechanical properties, allowing large cross-sections to maintain stability under high-power operating conditions.
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 device achieves high-energy laser beam amplification at rates exceeding 10 Hz with reduced maintenance and acquisition costs, and maintains optical properties by filtering out UV radiation and managing thermal stress, enabling efficient and cost-effective high-power laser systems.
Implementation Method 1
pumping means comprising lamps emitting first radiation in a frequency range useful for the amplification and second radiation capable of degrading the amplifying medium, integrated into a jacket which absorbs at least some of the second radiation
Implementation Method 2
optical diffuser
Implementation Method 3
cooling system to prevent degradation and ensure homogeneous pumping
Data Source
AI summary
The present invention relates to an amplification device comprising an amplifying medium (2) of parallelepiped shape and pumping means comprising lamps (5) emitting first radiation in a frequency range useful for the amplification and second radiation capable of degrading the amplifying medium. It is characterized in that lamps (5) are integrated into a jacket (3) that absorbs at least some of the second radiation.