Multi-Fiber Ferrule Laser Cutting for Protrusion Alignment
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Solution Overview
Problem
Conventional methods for manufacturing multi-fiber optic connectors are time-consuming and require expensive consumables, with the second row of fibers often being cleaved with less quality than the first row, resulting in shorter fiber protrusions and suboptimal physical contact during connector mating.
Innovation Solution
A method involving precision laser cutting of optical fibers in multi-fiber ferrules, where the laser beam is directed in specific directions to achieve equal or varying fiber extension lengths for each row, ensuring all end faces are aligned and polished to a final finish without damaging the second row's finish, potentially eliminating the need for subsequent polishing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional laser ablation process is used to cleave fibers in a single pass, then manufacturing speed is improved, but the second row of fibers is cleaved with less quality and shorter protrusion
Solution Approach 1:
The fiber cleaving process is divided into multiple sequential passes instead of a single pass. In the first pass, the laser beam cleaves all fibers in the first row. In the second pass, the laser beam cleaves all fibers in the second row. This segmentation allows each row to be processed independently with optimized parameters, ensuring consistent cleave quality across all fibers while maintaining manufacturing efficiency.
2Loss of time
If single-pass laser ablation is used, then processing time is reduced, but fiber protrusion length becomes inconsistent between rows
Solution Approach 1:
The method performs preliminary identification and positioning of fiber rows before cleaving. The laser beam is positioned and focused on the first row of fibers, cleaves them to the desired protrusion length, then repositions to the second row and cleaves those fibers to the same protrusion length. This preliminary positioning ensures that each row receives the correct cleave length independently, eliminating inconsistencies while keeping the overall process time acceptable.
3Device complexity
If conventional single-direction laser cutting is used, then the process is simpler, but the second row fibers cannot be cut to the required extension length without damaging the first row
Solution Approach 1:
The laser beam's position and orientation are dynamically adjusted between processing passes. During the first pass, the laser beam is positioned to cleave only the first row of fibers. After the first pass completes, the laser beam is repositioned and reoriented to cleave the second row of fibers to the same extension length. This dynamic adjustment of beam position and orientation enables precise control of fiber extension lengths for each row independently, while the overall process remains relatively simple.
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
This method enables the production of multi-fiber ferrules with precisely aligned and polished end faces, improving the quality and consistency of fiber optic connections, reducing manufacturing time and costs by ensuring all rows have sufficient fiber protrusions for optimal contact and signal transmission.
Implementation Method 1
A method involves precision laser cutting of optical fibers in multi-fiber ferrules, where the laser beam is directed in specific directions to achieve equal or varying fiber extension lengths for each row
Data Source
AI summary
The present disclosure generally relates to a method for processing optical fibers supported by a multi-fiber ferrule. The method can include laser cutting first and second rows of optical fibers in a first fiber cutting step by directing a laser beam in a first direction relative to the ferrule. The laser beam can cut the second row of optical fibers to a first fiber extension length and cut the first row of optical fibers to a second fiber extension length. The method can also include laser cutting the first row of optical fibers by directing a laser beam in a second direction relative to the multi-fiber ferrule. The laser beam cuts the first row of optical fibers to the first fiber extension length and by-passes the second row of optical fibers such that optical fibers of the second row of optical fibers remain at the first fiber extension length.