Multi-Fiber Optic Connector Housing for Compact QSFP/SFP Interfaces
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Solution Overview
Problem
Conventional duplex LC connectors and multi-fiber ferrules face limitations in accommodating multiple optical fibers within the footprint of QSFP/SFP transceiver interfaces, leading to space constraints and inability to interface more than two optical fibers effectively.
Innovation Solution
A multi-fiber optic connector housing design with a main body featuring three sections, including a front section for an elastic member, a middle section for optical fiber transition, and a rear section with a crimp ring, allowing for a plurality of optical fibers to fit within the footprint of a QSFP/SFP transceiver interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional duplex LC connectors are used, then only two optical fibers can be accommodated, but the space utilization in QSFP/SFP transceiver interfaces is insufficient
Solution Approach 1:
The connector housing is divided into multiple sections (first housing portion, second housing portion, third housing portion) that can accommodate multiple ferrules (first ferrule, second ferrule, third ferrule) independently. Each section houses specific ferrules and allows them to be positioned and secured separately, enabling high-density fiber integration within the compact QSFP/SFP footprint.
Solution Approach 2:
Multiple ferrules are arranged in a nested configuration where the first ferrule, second ferrule, and third ferrule are positioned within the housing structure such that they occupy overlapping or adjacent spatial regions. This nesting approach maximizes the number of fibers that can be contained within the limited transceiver interface area.
2Quantity of substance
If multi-fiber ferrules are used to increase fiber density, then more optical fibers can be interfaced, but the housing structure becomes more complex
Solution Approach 1:
The housing structure serves multiple functions: it provides structural support for multiple ferrules, maintains precise alignment between ferrules and optical cables, secures the elastic member, and interfaces with the transceiver. By integrating these functions into a single multi-section housing design, the patent avoids the need for separate components for each function, thereby managing complexity while achieving high fiber density.
Solution Approach 2:
The patent combines the functions of multiple ferrule holders, alignment mechanisms, and cable management structures into a single integrated housing assembly. The first, second, and third housing portions are merged into one coherent structure that simultaneously supports all ferrules and manages all optical cables, reducing the overall component count and simplifying assembly.
3Quantity of substance
If the housing accommodates multiple ferrules, then fiber density increases, but the alignment precision between ferrules and cables becomes more difficult to maintain
Solution Approach 1:
The housing structure is designed with pre-formed alignment features and positioning mechanisms that automatically guide the ferrules into correct positions during assembly. The elastic member is pre-configured to apply biasing force that maintains alignment, and the housing portions are designed with complementary geometries that ensure precise ferrule positioning before final assembly.
Solution Approach 2:
The elastic member automatically maintains alignment between the ferrules and optical cables through its biasing action. As the ferrules are inserted or as cables are connected, the elastic member self-adjusts to apply appropriate forces that keep the ferrules in their correct positions, eliminating the need for external alignment adjustment mechanisms.
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
Enables multiple optical fibers to be interfaced with a transceiver, overcoming space constraints and facilitating higher density fiber optic connections.
Implementation Method 1
a front section of the main body to receive an elastic member into the opening from the front end, said elastic member is adapted to bias a multi-fiber optic ferrule
Data Source
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AI summary
A housing (406) for a fiber optic connector includes an opening (426) extending between a front end (422) and a rear end (424), and having an integral spring stop surface between the front end and the rear end. A front section (428) receives an elastic member (404) into the opening (426) from the front end (422) and the elastic member (404) is engageable with the integral spring stop (430) of the housing. There is a middle section (470) of the main body (420) to transition optical fibers between a fiber optic ferrule and a fiber optic cable. A rear section (480) of the main body (420) has an outer surface to engage a crimp ring (408).