Optical Fiber Leakage Reduction Portion Combustion Prevention
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Solution Overview
Problem
Conventional optical fibers face challenges in preventing resin coating combustion while maintaining low propagation losses, especially during high-power light propagation and small-radius bending, as existing trench and hole-assisted fibers either fail to prevent combustion or incur excessive propagation losses.
Innovation Solution
An optical fiber design incorporating a leakage reduction portion within the physical cladding that surrounds the core region, which reduces leaked light by deflection, absorption, or scattering, without affecting the transmission characteristics, thereby minimizing light reaching the resin coating and maintaining low propagation losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a trench or hole-assisted fiber structure is used to prevent resin coating combustion, then light leakage from the core region is reduced, but propagation losses increase
Solution Approach 1:
The cladding is segmented into two distinct regions: an optical cladding that maintains light transmission and a physical cladding that provides mechanical protection. This segmentation allows the optical cladding to preserve low propagation losses while the physical cladding contains the leakage reduction portion that prevents resin coating combustion without affecting core light propagation.
Solution Approach 2:
The leakage reduction portion is localized within the physical cladding region rather than being applied to the entire fiber structure or the optical cladding. This localized approach ensures that the light-blocking function is provided only where needed (in the physical cladding) while the optical cladding maintains its light-transmissive properties for low-loss propagation.
2Reliability
If a leakage reduction portion is added to prevent resin coating combustion, then safety is improved, but device complexity increases
Solution Approach 1:
The leakage reduction portion is merged into the physical cladding region, combining the mechanical protection function of the physical cladding with the light leakage reduction function. This integration avoids adding a separate independent component and reduces overall structural complexity while maintaining reliability.
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 optical fiber effectively reduces the light quantity of leaked light to 1/10 or less, preventing resin coating combustion and achieving low-loss transmission, addressing the limitations of prior art by integrating a leakage reduction portion in the physical cladding that does not impact core region light propagation.
Implementation Method 1
a leakage reduction portion provided in a physical cladding, which reduces a light quantity of leaked light
Implementation Method 2
reduces leaked light by deflection, absorption, or scattering
Data Source
AI summary
The present invention relates to an optical fiber having a structure to enable both prevention of resin coating combustion due to leaked light, and low-loss light transmission. The optical fiber comprises a core region, and a cladding region. The cladding region is constituted by an optical cladding which affects the transmission characteristics of light propagating in the core region, and a physical cladding which does not affect the transmission characteristics of light propagating in the core region. Particularly, a leakage reduction portion is provided in the physical cladding so as to surround an outer periphery of the core region through the optical cladding. The leakage reduction portion functions to suppress propagation of the leaked light propagating from the core region toward outside the cladding region.