Thin-Disc UV Laser with Frequency Doubling for Stable Output
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Solution Overview
Problem
Existing UV laser technologies face challenges in generating temporally stable high-intensity UV light efficiently, particularly in applications requiring precision and stability, such as micro-scale machining and medical procedures.
Innovation Solution
The use of Semiconductor Thin Disc Lasers (STDLs) as Visible Wavelength Laser Light Sources (VWLS) combined with Non-Linear Crystals (NLCs) to convert visible light into UV light, employing VECSEL and MECSEL configurations with optimized laser cavities, heat spreaders, and pumping techniques to achieve stable UV output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional UV laser technologies are used, then UV light can be generated, but temporal stability and intensity consistency are poor
Solution Approach 1:
The patent combines a Visible Wavelength Laser Light Source (VWLS) with a Non-Linear Crystal (NLC) in a single integrated laser apparatus. The VWLS generates visible light that passes through the NLC to produce UV light through frequency doubling, merging two functional components into one system to achieve stable and intense UV output.
Solution Approach 2:
The patent introduces a Non-Linear Crystal (NLC) as an intermediary component between the visible light source and the final UV output. The NLC acts as a frequency converter that transforms visible wavelength light from the VWLS into UV wavelength light, enabling stable UV generation through this intermediate transformation step.
2Power
If high intensity visible light is generated, then UV conversion potential increases, but energy consumption increases
Solution Approach 1:
The patent optimizes the parameters of the Non-Linear Crystal (NLC), including its length, material composition, and positioning within the laser cavity, to maximize frequency conversion efficiency. By carefully selecting and adjusting these parameters, the system achieves high UV output with reduced energy waste, improving the overall energy efficiency of the visible-to-UV conversion process.
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
This approach enables the generation of temporally stable high-intensity UV light, suitable for precision applications by enhancing visible light intensity within the laser cavity and utilizing appropriate NLCs to convert it efficiently into UV light, ensuring stability and efficiency.
Implementation Method 1
a frequency doubling optics component, such as a Non-Linear Crystal (NLC) or a periodically poled material, to convert the visible light into UV light
Implementation Method 2
the STDL is electrically or optically pumped to generate the visible laser light
Data Source
AI summary
UV laser devices, systems, and methods are shown and/or described herein. Included are a method, device or system for VECSEL and MECSEL lasers including both barrier-pumped and in-well pumped lasers. Also disclosed is a method of manufacturing gain chips for use in the lasers, arrangements of lasers, and selection of proper non-linear crystal (NLC) for use in the device.