Optical Fiber Cladding Mode Removal via Thermally Conductive Composite
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Solution Overview
Problem
Existing optical processing structures for optical fibers fail to effectively remove cladding mode light without causing local heat generation or poor heat dissipation, as they lack a filler in the region where evanescent light seeps out during total reflection.
Innovation Solution
A thermally conductive protective material made of a silicone-based compound with a filler having a refractive index higher than the cladding, strategically placed in the coating removed region, which includes a combination of substances with refractive indices that adjust with temperature, ensuring effective cladding mode light removal and improved heat dissipation by controlling the filler's presence in the evanescent region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a thermally conductive protective material is provided around the cladding in the coating removed region, then heat dissipation is improved, but cladding mode light cannot be properly removed without a filler in the evanescent light region
Solution Approach 1:
The patent applies composite materials by combining a thermally conductive protective material (silicone-based compound) with a filler material (such as aluminum oxide, aluminum nitride, or boron nitride) to create a composite structure that simultaneously provides thermal conductivity and appropriate refractive index for cladding mode light removal. The filler particles are dispersed within the thermally conductive matrix, enabling both heat dissipation and optical interaction with evanescent light in the coating removed region.
Solution Approach 2:
The patent applies local quality by strategically placing the filler within the thermally conductive protective material specifically in the coating removed region where evanescent light is present. The filler concentration and distribution are optimized locally to interact with the evanescent field of cladding mode light, while the thermally conductive matrix provides heat dissipation throughout the protective material structure.
2Reliability
If a filler with high refractive index is added to the thermally conductive protective material, then cladding mode light removal is improved, but local heat generation may occur
Solution Approach 1:
The patent applies parameter changes by carefully selecting and controlling the refractive index of the filler material and its concentration within the thermally conductive protective material. The refractive index of the composite is optimized to be higher than the cladding to enable effective interaction with evanescent light for mode removal, while the filler concentration is controlled to maintain adequate thermal conductivity and prevent excessive local heat generation. The silicone-based matrix provides thermal management to distribute heat uniformly.
3Reliability
If the refractive index of the thermally conductive protective material is higher than the cladding at room temperature, then cladding mode light can be removed, but the refractive index relationship changes with temperature
Solution Approach 1:
The patent applies dynamics by accounting for the temperature-dependent refractive index changes of both the thermally conductive protective material and the cladding. The silicone-based matrix exhibits refractive index changes with temperature, and the filler materials also have their own thermal-optic coefficients. The overall design ensures that the composite protective material maintains appropriate refractive index characteristics across the operating temperature range to continue effectively removing cladding mode light under varying thermal conditions.
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 proper removal of cladding mode light while maintaining thermal conductivity and preventing localized heat generation, ensuring efficient heat dissipation and durability of the optical fiber.
Implementation Method 1
a filler having a refractive index higher than a refractive index of the cladding, and the filler is present in a region where evanescent light seeping out of the cladding is present when cladding mode light propagating in the cladding is totally reflected
Implementation Method 2
when cladding mode light propagating in the cladding is totally reflected
Implementation Method 3
a thermally conductive protective material made of a silicone-based thermally conductive compound and provided around the cladding in a coating removed region of the optical fiber
Data Source
AI summary
An optical processing structure of an optical fiber, includes: an optical fiber that includes a core, a cladding, and a coating, the coating being partially removed; and a thermally conductive protective material made of a silicone-based thermally conductive compound and provided around the cladding in a coating removed region of the optical fiber. Further, the thermally conductive protective material contains a filler having a refractive index higher than a refractive index of the cladding, and the filler is present in a region where evanescent light seeping out of the cladding is present when cladding mode light propagating in the cladding is totally reflected.