Transparent End-Plate Sealing for Hollow-Core Fiber Connectors

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Solution Overview

Problem

Hollow-core optical fibers are vulnerable to contaminants that can ingress into their hollow cores, leading to degraded performance and interference, which impedes their use in telecommunications systems.

Innovation Solution

A connector system for hollow-core optical fibers is provided, featuring a ferrule with a bore to receive the fiber and an optically transparent end plate that is laser-welded to the fiber's end face to seal the interior from debris ingress, with a bonding agent securing the fiber within the ferrule.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If hollow-core optical fiber is used to achieve faster light propagation speed and reduced latency, then transmission speed is improved, but vulnerability to contaminant ingress increases

Engineering Contradiction:
Improvelight propagation speedVSAvoidcontaminant ingress
Core Design Contradiction:
SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by sealing the hollow-core optical fiber interior with an end plate before the fiber is exposed to the ambient environment during connectorization. This preventive measure blocks contaminant ingress pathways at the fiber end face, ensuring the hollow core remains protected throughout deployment and operation, thereby maintaining the speed advantage while eliminating contamination vulnerability

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The end plate serves as an intermediary element between the hollow-core optical fiber interior and the external environment. This mediator physically separates the clean internal space from potential contaminants in the ambient environment, allowing the fiber to maintain its performance benefits while being protected from harmful factors through the intermediate barrier

Inventive Principle:
Principle #24Intermediary (Mediator)

2Ease of operation

If the hollow-core optical fiber interior is left open for connectorization, then ease of connection is improved, but risk of debris ingress increases

Engineering Contradiction:
Improveconnectorization processVSAvoidtransmission performance
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The end plate is installed during the connectorization process itself, performing the sealing action at the same time as the connection is made. This preliminary sealing ensures that once the connector is assembled, the hollow core is immediately protected, combining the ease of standard connectorization procedures with reliable contamination prevention

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent extracts the sealing function from the fiber structure itself and implements it as a separate end plate component. This allows the fiber to maintain its open-end configuration for easy connectorization while the extracted sealing element provides the necessary protection, separating the connection function from the protection function

Inventive Principle:
Principle #2Taking out (Extraction)

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 system effectively protects hollow-core optical fibers from contaminants, maintaining transmission performance and reducing the risk of interference, enabling their use in various applications without exposure to environmental degradation.

Implementation Method 1

an optically transparent end plate that is laser-welded to the fiber's end face to seal the interior from debris ingress

Methodology Applied
Scientific EffectLaser welding: Laser Beam Welding

Implementation Method 2

The end plate is also coupled to the ferrule to complete assembly of the connector. It will be understood that the end plate is optically transparent to transmit light energy to or from the hollow-core optical fiber

Methodology Applied
Scientific EffectLight transmission: Light

Data Source

PatentUS20260036761A1Connector for avoiding debris ingress into hollow core optical fibers in cable assemblies and related method
Publication Date: 2026.02.05 CORNING RES & DEV CORP
  • US20260036761A1 patent drawing
  • US20260036761A1 patent drawing
  • US20260036761A1 patent drawing

AI summary

A connector for use in a cable assembly is provided, specifically for cable assemblies including one or more hollow-core optical fibers. The connector includes a ferrule with bore(s) that receive the hollow-core optical fiber(s) and an end plate connected to end faces of the hollow-core optical fibers. The end plate is optically transparent for transmitting optical signals or light energy to and from the hollow-core optical fibers, and the end plate blocks and seals the hollow-core optical fibers at openings in the end faces to stop ingress of debris or other contaminants that can degrade or attenuate signal transmission through the interior of the fibers. Thus, cable assemblies using one or more hollow-core optical fibers are available and sufficiently robust and durable for use in further types of optical fiber systems.