Multi-Fiber Ferrule Polishing via Fine Mist Fluid Delivery
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Solution Overview
Problem
Traditional fiber optic connector polishing methods struggle to achieve consistently low insertion loss, particularly in single-mode connections, due to imprecision in polishing and excessive water usage, leading to uneven coplanarity and increased insertion loss.
Innovation Solution
The proposed method involves a polishing system that uses a fine mist of fluid to coat the polishing surface uniformly, reducing water usage and improving coplanarity, thereby achieving more consistent insertion loss performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional polishing methods are used with excessive water, then the polishing surface is lubricated and particulate matter is carried away, but coplanarity becomes uneven and insertion loss increases
Solution Approach 1:
The patent changes the physical state of water from liquid to vapor by heating it to form a mist. This parameter change allows the water to be applied as a fine aerosol that evaporates during polishing, providing lubrication without pooling or causing uneven coplanarity. The mist form enables controlled water delivery that prevents the harmful effects of excessive liquid water while maintaining the necessary lubrication for the polishing process.
2Object-generated harmful factors
If a large amount of water is added to the polishing surface, then ground particulates become more mobile and are cleared away, but coplanarity deteriorates and insertion loss increases
Solution Approach 1:
The patent uses a mist generator to create a fine aerosol of water that is delivered to the polishing surface. This pneumatic approach allows the water to be distributed as tiny droplets that evaporate during polishing, providing sufficient lubrication to carry away ground particulates without creating the pooling and uneven coplanarity associated with liquid water application. The aerosol form enables effective particulate removal while maintaining precision.
3Reliability
If traditional polishing equipment is used, then the fiber ferrule endfaces can be polished, but consistent low insertion loss is difficult to achieve
Solution Approach 1:
The patent fundamentally changes the water delivery parameter from liquid to vapor/mist form. This parameter change enables the water to evaporate during the polishing process, creating a controlled environment that improves both polishing precision and insertion loss consistency. The mist form allows for uniform water distribution without pooling, ensuring consistent polishing pressure and coplanarity across all fiber positions.
Solution Approach 2:
The patent implements a multi-stage polishing process with different mist application rates and polishing pressures. The process includes a coarse polishing stage, a fine polishing stage, and a coating stage, each with specific mist delivery parameters. This periodic variation in polishing conditions allows for progressive improvement of fiber endface quality, achieving consistent low insertion loss that cannot be obtained with single-stage traditional polishing.
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 approach results in a nearly threefold improvement in insertion loss performance, reducing it from approximately 0.75 dB to 0.27 dB per mated pair of fibers, while ensuring improved coplanarity and reduced differential fiber height.
Implementation Method 1
an exemplary method of polishing multi-fiber fiber optic ferrules with a polishing device is provided. The polishing device can include a polishing component with a polishing surface... applying a fine mist of fluid from the spray nozzle toward the polishing surface to completely coat the polishing surface with the fluid
Data Source
AI summary
An example method of polishing multi-fiber fiber optic ferrules with a polishing device is provided. The polishing device includes a polishing component with a polishing surface and a surface for securing multi-fiber fiber optic ferrules such that endfaces of the multi-fiber fiber optic ferrules are oriented to face and be positioned against the polishing surface. The method includes orienting an application device with a spray nozzle about 8 inches to about 12 inches away from the polishing surface, and orienting the spray nozzle of the application device at a downward angle of about 200 to about 300 relative to horizontal and the polishing surface. The method includes applying a fine mist of fluid from the spray nozzle toward the polishing surface to completely coat the polishing surface with the fluid. The method includes positioning the endfaces of the multi-fiber fiber optic ferrules against the polishing surface and polishing the endfaces.