Optical Transceiver Fiber Positioning via Interference Fit
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Solution Overview
Problem
Existing optical transceiver modules face challenges in precisely fixing optical fibers due to difficulties in matching the outer diameter of optical fibers with V-grooves, leading to reduced precision and coupling effectiveness.
Innovation Solution
An optical transceiver module with an optical fiber positioning structure that includes a first positioning part with a through-hole matching the fiber diameter, a supporting part for adjustable fixation, and additional positioning parts for precise alignment and adjustment, allowing for better control of optical fiber placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If V-grooves are used on the substrate to fix optical fibers, then the structure is simple and easy to manufacture, but the positioning precision is poor and optical fibers cannot be precisely matched
Solution Approach 1:
The positioning structure is divided into multiple independent components: a substrate with V-grooves for initial positioning, a positioning ring with through-holes for precise fiber fixation, and a cover plate for sealing. This segmentation allows each component to perform its specific function optimally while maintaining overall structural simplicity.
Solution Approach 2:
A positioning ring is introduced as an intermediary component between the substrate and the optical fibers. This positioning ring contains through-holes that precisely match the outer diameter of the optical fibers, serving as a mediator that transforms the imprecise V-groove positioning into precise fiber fixation without requiring complex direct coupling between the substrate and fibers.
2Reliability
If adhesive is used to fix optical fibers in V-grooves, then the fixation process is simple, but the positioning accuracy deteriorates and fibers may fall out
Solution Approach 1:
The adhesive-based chemical fixation method is replaced with a mechanical fixation system. The positioning ring with through-holes provides precise mechanical constraints that match the outer diameter of the optical fibers, ensuring reliable fixation through physical interference fit rather than relying on adhesive bonding, thereby improving both reliability and positioning accuracy.
3Manufacturing precision
If the optical fiber diameter does not precisely match the V-groove dimensions, then manufacturing is easier, but the coupling effect deteriorates
Solution Approach 1:
The design parameters of the positioning ring are made adjustable, particularly the dimensions and positions of the through-holes. This allows the through-hole parameters to be precisely matched to the outer diameter of the optical fibers being used, achieving accurate fiber-groove matching while maintaining ease of manufacture through parameter optimization rather than complex geometric design.
Data Source
AI summary
An optical transceiver module includes an optical fiber and an optical fiber positioning structure that fixes the optical fiber. The optical fiber positioning structure includes a first positioning part that fixes the said optical fiber, and a first supporting part that fixes the first positioning part on a case of the optical transceiver module. The first positioning part includes a first end face and a second end face opposite to one another, and a first through-hole that connects the first and second end faces. The inner diameter of the first through-hole is substantially equal to the diameter of the optical fiber, and the optical fiber is fixed within the first through-hole. The first supporting part includes an accommodating portion for accommodating the first positioning part. The first positioning part is fixed in the accommodating portion.