Fiber Splice Encapsulation With CLS for Cladding Light Loss
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Solution Overview
Problem
Fiber laser systems face significant challenges with splice losses due to the conversion between different fiber properties, particularly in multi-clad fibers, where cladding light can be lost uncontrolled, leading to hotspots and beam defects, and existing techniques do not effectively mitigate these issues while minimizing fiber length.
Innovation Solution
The implementation of cladding light strippers (CLS) on both sides of a fiber splice to encapsulate and remove cladding light, thereby protecting the splice from detrimental cladding light entry and converting it into heat, which is then managed through suitable materials and structures to prevent overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cladding light strippers are added to remove cladding light at splices, then beam quality and thermal management improve, but device complexity increases
Solution Approach 1:
The cladding light stripper is integrated within the splice structure itself, with the stripper material positioned in the gap between fiber ends. This nesting approach allows the CLS to be part of the splice assembly without requiring separate external components, thereby improving beam quality while minimizing the increase in device complexity.
Solution Approach 2:
The invention combines the splicing function with the cladding light stripping function into a single integrated structure. The splice assembly simultaneously joins fiber ends and removes cladding light through the integrated CLS material, reducing the number of separate components needed and simplifying the overall device structure.
2Productivity
If fiber length is reduced to minimize SRS effects, then system performance improves, but splice losses become more significant
Solution Approach 1:
The invention converts the potentially harmful cladding light that would otherwise cause thermal issues and beam defects into a beneficial effect by using it to activate the cladding light stripper material. This removes cladding light at the splice point, reducing energy loss and improving splice performance, thereby allowing shorter fiber lengths to be used without compromising system performance.
3Length of stationary object
If cladding light is allowed to propagate through the splice, then fiber length can be minimized, but hotspots and beam defects occur
Solution Approach 1:
The cladding light stripper material acts as an intermediary substance positioned in the splice gap between fiber ends. This intermediary absorbs and removes cladding light that would otherwise propagate through the splice and cause hotspots, while allowing the splice to maintain a compact structure with minimal fiber length.
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 improves beam quality and thermal management at the splice, reducing power dissipation and maintaining system performance by effectively removing cladding light and distributing thermal loads, thus minimizing losses and maintaining system integrity.
Implementation Method 1
cladding light strippers (CLS) may be employed within an optical fiber system to remove such cladding light
Data Source
AI summary
Spliced multi-clad optical fibers with a cladding light stripper (CLS) encapsulating the splice. The splice may facilitate conversion between two optical fibers having different architectures, such as different core and/or cladding dimensions. The CLS may comprise a first length of fiber on a first side of the splice, and a second length of fiber on a second side of the splice, encapsulating the splice within the lengths of the CLS. The splice may abut one or more of the lengths of the CLS, or may be separated from one or more lengths of the CLS by an intermediate length of a first and/or second fiber joined by the splice.