Multi-Row Optical Connector Polarity Inversion Schemes
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Solution Overview
Problem
Ensuring correct polarity in optical links with multiple transceivers and connectors is complex due to the need for precise orientation and book-keeping of fiber optic connectors and adapters, especially with multi-fiber connectors and angle-polished ferrules, which increases the chances of errors and user confusion.
Innovation Solution
The use of multi-fiber ferrules with two rows of optical fibers and guide pins, along with specific jumper and extender assemblies that include inversions of optical fibers, ensures correct polarity by simplifying the connection configurations to three main types: female-to-female jumper assemblies, male-to-male trunk assemblies, and male-to-female extender assemblies, ensuring an odd number of inversions between adapters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polarity schemes with physical polarity features and multiple adapter variants are used, then correct polarity can be maintained, but device complexity and ease of operation deteriorate due to extensive book-keeping and user confusion
Solution Approach 1:
The patent inverts the conventional approach by using optical fiber inversion within connectors rather than relying on physical polarity features and multiple adapter variants. The connector designs (e.g., inverted ferrule arrangements, crossed fiber paths) directly reverse the fiber order to achieve polarity correction, eliminating the need for complex book-keeping and multiple adapter types.
Solution Approach 2:
The patent creates universal connector designs that can handle both polarity correction and signal transmission through integrated structures. The inverted connectors and adapters serve multiple functions: maintaining mechanical alignment, correcting polarity through inverted fiber arrangements, and enabling direct mating without requiring specific polarity-matched adapter variants.
2Reliability
If physical polarity features and multiple adapter variants are implemented, then correct polarity is ensured, but ease of operation worsens due to user confusion and assembly verification requirements
Solution Approach 1:
The patent employs asymmetric connector designs where the inverted ferrule arrangements and crossed fiber paths create inherently non-symmetric structures. This asymmetry provides natural mechanical guidance for correct assembly while eliminating the need for users to verify polarity through book-keeping or remember which adapter variant to use for which configuration.
Solution Approach 2:
The inverted connector designs perform polarity correction automatically through their structural configuration. The crossed fiber paths and inverted ferrule arrangements self-correct polarity during the mating process itself, without requiring user intervention to verify or configure polarity settings, making the system self-servicing regarding polarity maintenance.
3Reliability
If multi-row ferrules with extensive book-keeping are used, then correct polarity can be maintained across multiple rows, but device complexity and difficulty of detecting and measuring worsen
Solution Approach 1:
The patent segments the multi-row fiber management into independent inverted connector modules. Each connector handles its own row inversion through dedicated crossed fiber paths within that row, allowing polarity correction to be detected and verified on a per-connector basis rather than requiring system-wide book-keeping across all rows and connectors.
Data Source
AI summary
Fiber optic assemblies are used to link transceivers carrying a signal from the transmitter portion of one transceiver to the receiver portion of another transceiver. The fiber optic assemblies have multi-fiber fiber optic connectors with a multi-fiber ferrule with two rows of optical fibers and with a gender of either male or female. When the fiber optic connectors have fiber optic connectors with the same gender, the plurality of optical fibers are inverted and when the fiber optic assemblies have fiber optic connectors with an opposite gender, the plurality of optical fibers are not inverted but switch rows. The inversion may also occur when the fiber optic connectors have the opposite gender in an alternative embodiment.