Multi-Clad Fiber Beam Shaping With Selective Core Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for generating laser beams with specific beam profile characteristics are complex and limited in adaptability, particularly when applications require single-wavelength beams or simpler adjustments.
Innovation Solution
A method utilizing a multi-clad fiber, specifically a double-clad fiber, where the input laser beam is electively coupled into the inner fiber core, the outer ring core, or both, to generate different beam profile characteristics, allowing for application-specific adjustments with minimal effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple laser beam sources with different wavelengths are coupled into an optical fiber at different coupling angles, then different beam profile characteristics can be achieved, but the device complexity and method complexity increase disproportionately
Solution Approach 1:
The optical fiber is segmented into multiple independent cores (inner core and outer ring core), each capable of guiding laser beams independently. This allows different beam profiles to be generated by selectively coupling light into different cores, avoiding the need for complex wavelength-multiplexing systems while achieving versatile beam profile control
Solution Approach 2:
A single optical fiber structure serves multiple functions by supporting both inner core and outer ring core guidance simultaneously. The same fiber can generate different beam profiles (Gaussian from inner core, top-hat from outer ring core) without requiring separate optical systems, reducing overall device complexity
2Adaptability or versatility
If two laser beam sources are used to achieve specific laser beam properties, then adaptability to different applications is improved, but the device complexity increases
Solution Approach 1:
The system enables dynamic selection of beam profiles by controlling which core receives the laser input. A single laser source can be dynamically directed to the inner core for Gaussian profiles or the outer ring core for top-hat profiles, providing application-specific adaptability without requiring multiple fixed laser sources
Solution Approach 2:
The beam profile characteristics are changed by altering the coupling parameters (which core receives the light) rather than changing the laser source itself. This allows a single laser source to produce different beam profiles by changing the coupling configuration, reducing the need for multiple laser sources
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 flexible and efficient generation of laser beams with varying beam quality and profile, suitable for diverse applications such as laser cutting and welding, without increasing the complexity of the arrangement.
Implementation Method 1
a laser beam is coupled into one fiber end of a multi-clad fiber, in particular a double-clad fiber, and coupled out of the other end of the multi-clad fiber
Data Source
AI summary
Methods and systems for generating a laser beam with different beam profile characteristics are provided. In one aspect, a method includes coupling an input laser beam into one fiber end of a multi-clad fiber, in particular a double-clad fiber and emitting an output laser beam from the other fiber end of the multi-clad fiber. To generate different beam profile characteristics of the output laser beam, the input laser beam is electively coupled either at least into the inner fiber core of the multi-clad fiber or at least into at least one outer ring core of the multi-clad fiber, or a first sub-beam of the input laser beam is coupled into at least into the inner fiber core of the multi-clad fiber and a second, different sub-beam of the input laser beam is coupled at least into the at least one outer ring core of the multi-clad fiber.