Gas Discharge Laser Line Narrowing Module Alignment
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Solution Overview
Problem
Existing line narrowing modules for gas discharge laser systems face challenges in maintaining alignment between the grating and prism assembly, which can lead to misalignment, impacting beam profiles and output energy, especially in single oscillator resonant cavity and dual chambered laser systems.
Innovation Solution
A tilt and lock mechanism for the line narrowing module (LNM) housing allows for precise adjustment and locking of the grating and prism assembly alignment, ensuring stability over time, even when the module is removed or replaced, using a combination of adjustable mounts and locking mechanisms to maintain optical axis alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a line narrowing module is used to narrow laser bandwidth, then spectral purity is improved, but alignment stability between grating and prism assembly deteriorates
Solution Approach 1:
The line narrowing module is divided into separate functional components (grating assembly, prism assembly, beam expander) that can be independently aligned and adjusted. This segmentation allows for precise spectral control while maintaining alignment stability through individual adjustment mechanisms for each component.
Solution Approach 2:
The grating and prism assemblies are pre-aligned to the optical axis before final assembly. This preliminary alignment action ensures that when the module is assembled and installed, the components maintain their relative positions and alignment, preventing misalignment issues during operation.
2Manufacturing precision
If adjustable mounts are used to align optical components, then alignment precision is improved, but device complexity increases
Solution Approach 1:
The alignment adjustment mechanisms are extracted as separate, modular components that can be independently adjusted and locked. This allows for precise alignment without requiring complex integrated adjustment systems, simplifying the overall device structure while maintaining alignment precision.
Solution Approach 2:
The adjustable mounts incorporate self-locking mechanisms that maintain alignment without requiring continuous active adjustment. Once aligned, the components lock into position automatically, eliminating the need for complex control systems while preserving alignment precision.
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 solution ensures consistent beam profiles and output energy stability by maintaining precise alignment between the grating and prism assembly, enhancing the performance of gas discharge laser systems.
Implementation Method 1
a dispersive center wavelength selective element
Implementation Method 2
a beam expander comprising a plurality of refractive elements
Data Source
AI summary
A line narrowed gas discharge laser system and method of operating same is disclosed which may comprise a dispersive center wavelength selective element; a beam expander comprising a plurality of refractive elements; a refractive element positioning mechanism positioning at least one of the refractive elements to modify an angle of incidence of a laser light beam on the dispersive center wavelength selection element; each of the dispersive center wavelength selection element and the beam expander being aligned with each other and with a housing containing at least the dispersive center wavelength selection element; a housing positioning mechanism positioning the housing with respect to an optical axis of the gas discharge laser system. The dispersive element may comprise a grating and the beam expander may comprise a plurality of prisms. The housing may contain the dispersive center wavelength selective element and the beam expander. The housing positioning element may comprise a position locking mechanism.