Laser Beam Shaping Lens Array for M-Profile Generation
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Solution Overview
Problem
Existing devices for converting laser radiation into laser radiation with an M-profile suffer from poor beam quality, particularly when the radiation is coupled from a laser diode bar or multiple laser diode bars, resulting in suboptimal performance.
Innovation Solution
A device employing a lens array with at least two lenses is used to create regions of lower intensity or 'holes' in the laser radiation cross-section, which are then transferred to a working plane or the entrance face of an optical fiber, producing laser radiation with an M-profile and improved beam quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a conical end section is used as separating means, then an M-profile can be generated, but the beam quality deteriorates
Solution Approach 1:
The patent divides the beam separation function into multiple discrete lenses arranged in arrays, where each lens creates a specific partial beam. This segmentation allows precise control over the intensity distribution to achieve M-profile while maintaining beam quality through optimized lens geometry and arrangement.
Solution Approach 2:
The patent applies different optical properties to different regions of the optical system by using lens arrays with specific focal lengths, apertures, and arrangements tailored for each region. This local optimization enables simultaneous achievement of M-profile shape and high beam quality in different spatial zones.
2Power
If laser radiation is coupled from laser diode bars, then high power can be achieved, but the beam quality deteriorates
Solution Approach 1:
The patent uses lens arrays to process radiation from multiple laser diode bars by dividing it into separate partial beams, each processed independently through specific lenses. This segmentation allows high power from multiple sources to be combined while maintaining beam quality through individual optimization of each beam path.
Solution Approach 2:
The lens arrays serve as intermediary optical elements that mediate between the multiple laser diode bar sources and the final combined beam. These intermediaries transform the combined high-power radiation into a quality M-profile by controlling the spatial distribution and interference of partial beams.
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 effectively generates laser radiation with an M-profile and enhanced beam quality, improving the performance by creating a region of lower intensity in the center, thereby enhancing the beam quality at the output of the optical fiber.
Implementation Method 1
The separating means include at least one lens array with at least two lenses. With the at least one lens array, at least two partial beams propagating in different directions can be produced.
Data Source
AI summary
The invention relates to a device for converting laser radiation (21) into laser radiation having an M profile, comprising separating means (34), which can separate the laser radiation (21) into at least two partial beams (22, 23) which, at least in some sections or partially, move in different directions or are arranged offset from one another, and optics means (38), which can introduce the at least two partial beams (22, 23) in a working plane and/or can, at least in some sections, superimpose the at least two partial beams (22, 23) in the working plane, wherein the separating means (34) comprise a lens array (39, 41) having at least two lenses (40, 42).