Polarization-Maintaining Fiber Ferrule Assembly with Stripped Cladding
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Solution Overview
Problem
Existing optical connectors using polarization maintaining optical fibers face challenges in maintaining rotational alignment, as the loosely attached polymer buffer allows the glass fiber to rotate and piston, making it difficult to achieve consistent polarization alignment.
Innovation Solution
An optical ferrule assembly is designed with polarization maintaining optical fibers that have a stripped section exposing the cladding, which is permanently attached to an optical fiber retainer. The fibers are rotated to achieve alignment, and an adhesive is applied to the stripped section to secure the cladding in place, preventing movement and ensuring rotational alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the polymer buffer is used to protect the optical fiber, then the fiber is protected from damage, but the loose attachment allows the fiber to rotate and piston, making it difficult to maintain rotational alignment
Solution Approach 1:
The optical fiber is divided into three distinct sections: a protected section with the polymer buffer, a stripped section with exposed cladding for attachment, and a free section extending toward the ferrule. This segmentation allows the buffer to provide protection while the stripped section enables secure attachment to the retainer, preventing rotation and piston movement.
Solution Approach 2:
The polymer buffer is selectively stripped from a specific section of the optical fiber to create a localized attachment zone. This local modification allows the buffer to remain intact in other areas for protection, while the stripped section provides direct cladding attachment to the retainer for stable rotational alignment.
2Stability of the object's composition
If the buffer is stripped to expose the cladding for attachment, then rotational alignment can be maintained, but the fiber loses protective buffering at that location
Solution Approach 1:
The fiber is segmented into protected and stripped zones, allowing the buffer to remain intact in sections where protection is needed while being removed only in the attachment zone where rotational stability is required.
Solution Approach 2:
The buffer is stripped in advance before assembly, exposing the cladding for subsequent attachment to the retainer. This preliminary preparation enables secure attachment that maintains rotational alignment throughout operation.
3Ease of operation
If the fiber is allowed to move freely in the retainer, then insertion is easier, but consistent polarization alignment cannot be achieved
Solution Approach 1:
The optical fibers are pre-aligned and pre-attached to the retainer before final assembly. This preliminary alignment ensures that when the connector is assembled, the polarization axes are already matched, achieving consistent polarization alignment without requiring complex adjustment during installation.
Solution Approach 2:
The retainer structure is designed to automatically maintain the aligned position of the fibers through the attachment mechanism. Once the fibers are attached to the retainer, the structure itself serves to maintain their rotational alignment, eliminating the need for external adjustment mechanisms.
Data Source
AI summary
An optical ferrule assembly configured to be used in an optical connector includes an optical ferrule, an optical fiber retainer, and a plurality of polarization maintaining optical fibers. Each of the polarization maintaining optical fibers includes a core surrounded by a cladding surrounded by a buffer. The buffer is stripped at a location spaced apart from a fiber end of the polarization maintaining optical fiber to form a stripped section exposing the cladding disposed between first and second unstripped sections of the polarization maintaining optical fiber. The first unstripped section extends from the stripped section toward the fiber end of the polarization maintaining optical fiber. The fiber end is permanently attached to the optical ferrule, and the exposed cladding in the stripped section is permanently attached to the optical fiber retainer.