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Design Features Of Fiber Optic Connectors

Jun 22, 2017


Fiber optic connectors are unique. The fiber optic cable sends the light pulse, not the electrical signal, so the termination must be more accurate. Rather than just allowing the pin to make metal-to-metal contact, in order to allow communication, the fiber optic connector must be perfectly aligned with the microscope glass. Although there are many types of fiber optic connectors, they have similar design features.

Double fiber and single fiber:

Single fiber refers to a connector for each port

However, the dual fiber refers to two connectors per port

The three main components of the fiber optic connector are metal ring, connector body, and coupling mechanism.

Metal ring - it is a thin structure (usually cylindrical), the actual holding of glass fiber. There is a hollow center on the fiber that forms a tight handle. Fiber Optic Connector Metal rings are usually made of ceramic, metal, or high quality plastic, and will usually hold a chain of fibers.

The connector body - which is a plastic or metal structure that holds the ferrule and attaches to the sheath and strengthens the cable itself.

Coupling mechanism - This is part of the connector body when it is connected to another device (switch, network card, bulkhead coupler, etc.) for the fixed connector. It may be a latch clip, Fiber Optic Connector a bayonet nut, or a similar device.

Optical fiber connector grinding and polishing process

If the connector is terminated with a single-mode fiber, usually use epoxy resin will be fixed in the ferrule, the following fiber optic connector as an example to illustrate the optical fiber connector grinding and polishing process:

First: 5-15 microns of coarse grinding paper grinding insert, Fiber Optic Connector for about 5 minutes, the purpose is to remove the ferrule around the ferrous resin and other substances;

Second: 5 microns of alumina grinding paper gently grinding the fiber end to remove the fiber on the epoxy resin and other fouling;

Third: with 3-6 micron diamond grinding paper polished fiber / ferrule end face;

Fourth: with 1 micron diamond grinding paper carefully grinding out the scratches on the fiber, Fiber Optic Connector and finally get a smooth fiber end;

Fifth: with a special grinding paper (including polishing slurry) polishing fiber on the end of the metamorphic layer;

Sixth: check the ferrule and fiber. Use a hand-held microscope to observe the ferrule and fiber end to ensure that the grinding and polishing thoroughly, if the fiber is still scratched or defaced, Fiber Optic Connector need to re-polished ferrule and fiber.

The fiber optic connector market has been predicted for many years as a promising market and has finally taken off today. The use of embedded optical and fiber optic connectors from plastic optical fiber (POF) for automotive communication systems to high performance computing (HPC) is growing. The largest market segments for fiber-optic connectors are the telecom / data communications market and the LC connector. One of the fastest growing markets is embedded optics, as well as midplane and backplane connectors.