Single-Station Splicing Unit for Optical Fiber Protection

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Solution Overview

Problem

Traditional fusion splicing requires high precision and maintenance, is costly due to expensive equipment and frequent electrode replacement, and is prone to operator errors and damage during the splicing process due to the need for multiple stations and delicate handling.

Innovation Solution

A single-station splicing unit with a housing and alignment element that securely clamps and protects the spliced fibers, eliminating the need for an oven station and heat-shrinkable sleeves, using electrodes within the housing to create the splice and providing mechanical protection, thus simplifying the process and reducing operator mistakes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional two-station fusion splicer is used, then reliable fiber splicing is achieved, but device complexity and operator skill requirements increase

Engineering Contradiction:
Improvesplicing reliabilityVSAvoidsplicing process complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the splicing function and protective sleeve application into a single station. The housing serves dual purposes: it protects the fiber ends during splicing and acts as the protective sleeve that remains on the fiber after splicing, eliminating the need for a separate oven station and heat-shrinkable sleeve application step.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The housing performs multiple functions: it provides mechanical protection during splicing, serves as an alignment reference, acts as the final protective covering for the splice, and eliminates the need for separate protective sleeves. This multi-functionality reduces device complexity while maintaining splicing reliability.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Reliability

If traditional fusion splicer with separate protective sleeve is used, then mechanical protection is provided, but risk of damage during transfer increases

Engineering Contradiction:
Improvesplice protectionVSAvoiddamage risk during transfer
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The protective function is merged into the housing itself rather than requiring a separate protective sleeve application step. The housing remains on the fiber after splicing, providing continuous protection from the splicing process through final installation, eliminating the delicate transfer step between stations.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The housing is pre-positioned on the fiber before splicing and remains in place throughout the entire process. This preliminary positioning ensures protection is already in place before the splice is made, eliminating the risk of damage during subsequent transfer and protective sleeve application.

Inventive Principle:
Principle #10Preliminary action

3Manufacturing precision

If high-precision two-station splicer is used, then accurate fiber alignment is achieved, but maintenance requirements and cost increase

Engineering Contradiction:
Improvefiber alignment precisionVSAvoidequipment maintenance
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

Alignment features are pre-formed on the housing and alignment element before use. These features guide the fiber ends into proper alignment position, providing precise alignment without requiring complex active alignment mechanisms or high-precision adjustable stages that would increase maintenance requirements.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The housing and alignment element can be designed as disposable or low-cost components that are replaced periodically. This eliminates the need for expensive, high-precision, maintenance-intensive alignment mechanisms while maintaining adequate alignment precision for reliable splicing.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

4Reliability

If electrodes are used for arc splicing, then fiber fusion is achieved, but electrode wear and replacement cost increase

Engineering Contradiction:
Improvefiber fusionVSAvoidelectrode lifespan
Core Design Contradiction:
ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The housing with integrated electrodes can be designed as a disposable or low-cost consumable unit. After a certain number of splices or when electrode wear reduces performance, the entire housing is replaced rather than requiring expensive electrode replacement procedures. This reduces maintenance complexity and cost while maintaining reliable fiber fusion.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

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 precise, cost-efficient fiber splicing with reduced maintenance needs and operator skill requirements, minimizing the risk of damage and errors by integrating protection and alignment within a single unit.

Implementation Method 1

The splicing unit includes a pair of electrodes disposed within the housing that creates the high-voltage arc to splice the fiber ends

Methodology Applied
Scientific EffectElectric arc: Electric Arc

Implementation Method 2

generating and controlling a high-voltage arc to melt the fiber ends together

Methodology Applied
Scientific EffectMelting: Melting

Implementation Method 3

The alignment element assists with precisely aligning the fiber ends prior to fixedly clamping the fibers within the housing

Methodology Applied
Scientific EffectMechanical alignment:

Implementation Method 4

The housing remains on the fibers after using the fusion splicer to protect the spliced fibers without the need for an oven station or a protective sleeve

Methodology Applied
Scientific EffectMechanical protection:

Data Source

PatentUS11714236B2Single-station splicing unit and method
Publication Date: 2023.08.01 LEGRAND DPC LLC
  • US11714236B2 patent drawing
  • US11714236B2 patent drawing
  • US11714236B2 patent drawing

AI summary

An example single-station splicing unit is provided that includes a housing, an alignment element, a first electrode, and a second electrode. The housing includes an interior space and at least one cover configured to be interlocked with the housing to enclose the interior space. The alignment element is disposed within the interior space of the housing. The first electrode is disposed on one side of the housing, and the second electrode is disposed in the housing on an opposing side from the first electrode and in a facing relationship with the first electrode. The housing is configured to receive fibers in an opposing and abutting relationship to splice the fibers, and the housing remains secured to the fibers after splicing.