Fiber Cladding Light Stripper with Segmented Glue Regions
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Solution Overview
Problem
High power fiber laser systems face instability issues due to unwanted residual light in the cladding, which current cladding light strippers fail to effectively manage, leading to localized heating and inefficiencies.
Innovation Solution
A cladding light stripper design featuring a conductive housing with sequentially arranged glue regions of varying refractive indices, which securely attach to the fiber and efficiently remove both low and high NA light, distributing heat load uniformly to prevent overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional cladding light strippers are used to remove residual light, then light attenuation is achieved, but localized heating occurs due to uneven heat distribution
Solution Approach 1:
The stripper is divided into multiple discrete regions along the fiber length, each with different refractive indices. This segmentation allows the light stripping function to be distributed across multiple zones, preventing concentration of heat in a single location and enabling better thermal management through staged light removal.
Solution Approach 2:
Different regions of the stripper are assigned different refractive indices tailored to specific local requirements. Regions with higher refractive indices target specific NA ranges, allowing optimized light stripping in each zone while distributing heat generation across multiple locations with varying thermal characteristics.
2Productivity
If high refractive index materials are used to strip high NA light, then light removal efficiency improves, but device complexity increases due to multiple material requirements
Solution Approach 1:
The refractive index parameter is systematically varied across different regions of the stripper to match the NA distribution of cladding light. By changing this single optical parameter in a controlled manner across zones, the design achieves comprehensive light stripping without requiring complex multi-material constructions, simplifying manufacturing while maintaining high efficiency.
3Reliability
If multiple polymers with different refractive indices are applied at different locations, then light stripping performance improves, but manufacturing complexity increases
Solution Approach 1:
The stripper structure is segmented into discrete applyable regions along the fiber, allowing sequential application of different polymer materials. This segmentation enables a systematic manufacturing approach where each zone can be prepared and coated in a standardized sequence, reducing overall process complexity compared to simultaneous multi-material application.
Solution Approach 2:
The stripper design uses a universal base structure (the fiber-coating geometry) that can accommodate different polymer materials in different zones. This universal platform approach allows the same manufacturing process to be used across all regions, with only the material selection varying, thereby simplifying the overall manufacturing procedure while achieving differentiated light stripping performance.
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 enables high power laser systems to operate reliably at higher powers with reduced size and increased versatility, effectively attenuating unwanted light and managing heat distribution.
Implementation Method 1
a plurality of glue regions wherein the section of fiber is immersed therein... The respective lengths or refractive indexes of each glue region may differ from one to the next... For some glue regions along the arrangement of glue regions the refractive index is larger than both immediately preceding and following glue regions
Data Source
AI summary
A high power cladding light stripper and high power laser systems using the same are described. A cladding light stripper includes a housing, a section of fiber disposed in relation to the housing wherein a portion of the section of fiber has an exposed cladding region, a plurality of glue regions sequentially arranged adjacent to each other along the section of fiber and covering the exposed cladding region, and wherein at least one glue region between a first glue region and a last glue region of the plurality of glue regions has a refractive index higher or lower than both an adjacent previous glue region and an adjacent subsequent glue region.