Multi-Core to Single-Mode Fiber Connector Alignment

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Solution Overview

Problem

Existing connector systems for multi-core and single-mode fibers require precise alignment, which is complex and challenging, especially when different core arrangements are involved, leading to issues like signal interference and loss.

Innovation Solution

A connector system comprising a first ferrule for multi-core fibers, a second ferrule for single-core fibers, and an optical connection member with guide pins and holes for alignment, along with lens plates and relay plates to manage optical signals and suppress interference, allowing for precise alignment and efficient optical connection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If an optical connector is used to connect multi-core fiber and single-mode fiber, then optical signal transmission is enabled, but high-precision alignment becomes complex and challenging

Engineering Contradiction:
Improveoptical connection reliabilityVSAvoidalignment complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces a connector body as an intermediary component that pre-integrates the optical system (lenses, reflectors, and positioning structures). This mediator simplifies the alignment process by providing a unified reference frame, eliminating the need for complex multi-component alignment procedures while ensuring reliable optical connection between multi-core fiber and single-mode fiber.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Adaptability or versatility

If different core arrangements are involved in multi-core and single-mode fibers, then connection versatility is improved, but alignment precision deteriorates

Engineering Contradiction:
Improvecore arrangement adaptabilityVSAvoidalignment precision
Core Design Contradiction:
Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent employs a movable connector body that can shift position along the optical axis and laterally. This dynamic positioning capability allows the connector to adapt to different core arrangements in multi-core fibers while maintaining precise alignment with single-mode fibers. The movable structure enables flexible adjustment to match various core configurations without compromising alignment precision.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS11947170B2Connector system, optical connection method, and optical connection member
Publication Date: 2024.04.02 FUJIKURA LTD
  • US11947170B2 patent drawing
  • US11947170B2 patent drawing
  • US11947170B2 patent drawing

AI summary

A connector system includes: a first ferrule configured to hold end parts of multi-core fibers; a second ferrule configured to hold end parts of single-core fibers; and an optical connection member. The optical connection member is arranged between the first and the second ferrule, and includes an optical system configured to optically connect respective cores included in the multi-core fibers and the single-core fibers. A guide pin is formed on one of the first and the second ferrule, and a guide hole is formed in another of the first and the second ferrule. A through hole is formed in the optical connection member, and the first ferrule, the optical connection member, and the second ferrule can be aligned by fitting the guide pin in the guide hole through the through hole.