Terahertz Hollow Core Waveguide Segmented Support Strips
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Solution Overview
Problem
Existing terahertz waveguides face challenges in maintaining structural stability and minimizing transmission loss due to the impact of support units, particularly in hollow core Bragg waveguides with thin cladding walls and large core air holes, where structural losses from support strips are significant.
Innovation Solution
A terahertz hollow core waveguide design featuring cascaded units with segmented support strips, where support strips are alternately arranged along the circumferential direction and periodically distributed along the axial direction, reducing the disruption to the band gap structure and minimizing transmission loss while ensuring mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If support strips are added to maintain mechanical stability of the waveguide structure, then structural stability is improved, but transmission loss increases due to disruption of the band gap structure
Solution Approach 1:
The support structure is segmented into discrete support strips positioned at specific locations within the waveguide cross-section, rather than using continuous support. This segmentation minimizes the disruption to the photonic band gap structure while providing necessary mechanical support at critical points where the dielectric rings and air rings intersect with the cladding walls.
Solution Approach 2:
Support strips are strategically positioned only where mechanically necessary - at the intersections of dielectric rings/air rings with cladding walls - rather than uniformly distributed. This local placement provides structural stability exactly where needed while minimizing the overall impact on the photonic band gap and reducing transmission loss.
2Stability of the object's composition
If continuous support structure is used to ensure mechanical stability, then structural stability is improved, but the impact on transmission loss increases
Solution Approach 1:
The continuous support structure is replaced with discrete, segmented support strips positioned at specific locations. This segmentation allows the support function to be maintained while minimizing the total volume of support material that disrupts the photonic band gap structure, thereby reducing transmission loss.
Solution Approach 2:
The harmful continuous support structure is extracted and replaced with minimal discrete support elements only where mechanically necessary. This removal of excessive support material reduces the disruption to the photonic band gap while maintaining the essential mechanical stability function.
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 design effectively decreases transmission loss caused by support strips and maintains structural stability, achieving low loss transmission similar to hollow core waveguides without support strips, while providing stable mechanical support through a cascaded arrangement of waveguide units.
Implementation Method 1
The Bragg structure of one-dimensional photonic crystal has strong confinement ability to mode fields
Implementation Method 2
The Bragg structure of one-dimensional photonic crystal has strong confinement ability to mode fields
Data Source
AI summary
A terahertz hollow core waveguide includes several successively cascaded waveguide units, and the waveguide units includes fiber core and cladding. The fiber core is composed of air, and the cladding is composed of dielectric rings, air rings, support strips, and an outer cladding. The medium rings and the air rings are successively surrounded on the outside of the fiber core, and the outer cladding is surrounded on the outside of the outermost air ring. All support strips in the same air ring of the same waveguide unit form a support strip group, and the support strips in the support strip group are arranged along the circumferential direction to connect two adjacent dielectric rings in the same waveguide unit or to connect the outermost dielectric ring and the outer cladding in the same waveguide unit.