Triple Clad Fiber Splice Mitigates Heat Buildup
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fiber-optic systems with double clad and single clad fibers face issues with axial misalignment at fusion splice points, leading to signal light and residual excitation light entering the clad, causing heat buildup and potential fiber degradation, especially in high-output applications.
Innovation Solution
Incorporating a triple clad fiber between the double clad and single clad fibers, where the signal light and excitation light are managed to enter specific clads, preventing leakage and converting residual excitation light into heat using strategically placed heat dissipating sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a double clad fiber and single clad fiber are directly fusion spliced, then the structure is simple and easy to manufacture, but axial misalignment causes signal light and excitation light to enter the clad, generating heat and degrading the fiber
Solution Approach 1:
A triple clad fiber is introduced as an intermediary component between the double clad fiber and single clad fiber. This intermediate fiber acts as a buffer zone that prevents direct coupling between the core of the double clad fiber and the clad of the single clad fiber, thereby eliminating the harmful effect of axial misalignment while maintaining manufacturing simplicity
Solution Approach 2:
The direct connection between double clad fiber and single clad fiber is segmented by inserting a triple clad fiber in between. This segmentation creates distinct functional zones: the triple clad fiber's multiple clads provide graded refractive index transitions that guide light properly even with misalignment, thus resolving the contradiction between simple structure and reliable performance
2Power
If high output power is used to improve system performance, then the amplification capability increases, but heat generation increases and causes fiber degradation
Solution Approach 1:
The triple clad fiber structure converts the potentially harmful scattered light and misaligned excitation light that would normally enter the single clad fiber's clad into beneficial guided modes. By providing additional clad layers with appropriate refractive indices, the structure redirects this light into the core or first clad of the triple clad fiber, preventing heat generation in the single clad fiber while maintaining high output power capability
Solution Approach 2:
The triple clad fiber serves as a thermal and optical buffer between the high-power double clad fiber and the single clad fiber. It absorbs and redistributes the optical energy, preventing direct transfer of excessive heat to the single clad fiber, thus enabling high power operation without thermal degradation
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 configuration reduces heat generation and enhances reliability by dispersing heat dissipation, preventing fiber degradation and maintaining high performance even in high-power applications.
Implementation Method 1
a first clad 13b1, a second clad 13b2, and a third clad 13b3, which third clad 13b3 surrounds the second clad 13b2
Implementation Method 2
converting residual excitation light into heat using strategically placed heat dissipating sections
Implementation Method 3
a fusion splice point between the first optical fiber 11 and the second optical fiber 12 is referred to as P2
Data Source
Figure 1
Figure 2
Figure 3
AI summary
In a fiber amplifier (1) including a third optical fiber (13) made of a double clad fiber for amplifying light and a fifth optical fiber (15) made of a single clad fiber for transmitting the light amplified by the double clad fiber, a fourth optical fiber (14) made of a triple clad fiber is inserted between the third optical fiber (13) and the fifth optical fiber (15).