Fiber Laser Cavity Package Thermal Management via Segmented Stacking
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Solution Overview
Problem
High-power fiber laser cavity packages face challenges with heat dissipation and fiber management, leading to reliability issues and potential overheating due to complex designs and fiber crossings, which complicate thermal management and maintenance.
Innovation Solution
A multi-layer fiber laser cavity package design where all elements are in contact with heat-conducting surfaces, eliminating fiber crossings by stacking sections with selected elements on separate layers, and using heat-conducting surfaces with thermal conductivity greater than 1 W·m−1 to efficiently dissipate heat, with a cooling source attached to the layer with the gain fiber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a ring-shape body is used to accommodate optical fiber loops, then heat dissipation is enhanced, but device complexity increases and fiber placement becomes difficult
Solution Approach 1:
The patent divides the fiber laser cavity into multiple discrete elements (gain fiber, pump diodes, splices, gratings) and organizes them into separate sections that can be independently managed and stacked, eliminating the complex ring-shape body while maintaining heat dissipation through modular construction
Solution Approach 2:
The patent transitions from a two-dimensional planar layout to a three-dimensional stacked configuration, placing different fiber cavity sections on separate layers stacked vertically, which simplifies heat management and fiber routing while improving density
2Ease of operation
If fiber laser cavity elements are placed in a single layer, then fiber management is simple, but heat dissipation efficiency decreases
Solution Approach 1:
The patent utilizes the vertical dimension by stacking fiber cavity sections on multiple layers, allowing heat to be conducted away from densely packed elements through thermal vias and heat sinks positioned on each layer, thereby improving heat dissipation without compromising fiber management
Solution Approach 2:
By segmenting the fiber cavity into discrete sections distributed across multiple layers, the patent enables independent thermal management for each section while maintaining simple fiber routing within and between layers
3Adaptability or versatility
If fiber crossings are present in the package, then fiber routing is flexible, but thermal management and maintenance become complicated
Solution Approach 1:
The patent segments the fiber cavity into modular sections placed on separate layers, eliminating fiber crossings by providing dedicated routing paths for each fiber segment, which simplifies both thermal management and maintenance access
Solution Approach 2:
By moving fiber routing to multiple vertical layers with controlled inter-layer connections, the patent eliminates the need for fiber crossings while maintaining routing flexibility and improving accessibility for maintenance
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 design enhances thermal management, reduces the risk of overheating, and simplifies maintenance by ensuring all fiber laser cavity elements are in contact with heat-conducting surfaces, improving the reliability and efficiency of high-power fiber laser packages.
Implementation Method 1
all of the fiber laser cavity in the package is in contact with a heat-conducting surface
Data Source
AI summary
Embodiments of the invention include a fiber laser cavity package having improved fiber management and thermal management capability and methods of making such fiber laser cavity package. Each element of the fiber laser cavity is grouped into plurality of sections and each section is placed onto a heat conducting surface within the fiber laser cavity package to dissipate unwanted heat from the elements. When the fiber laser cavity is stored in the package, the fiber laser cavity is arranged such that fiber crossings are substantially reduced or eliminated within the package.