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The history of fiber optic connectors Legacy
:: Choice of connectors
Over the years, a wide variety of fiber connectors optics have been designed for most fiber optic installations. Lightwave equipment manufacturers have never standardized a single type of connector, they actually provide a selection of connectors for their equipment interface.
It is very important to choose the type of connector fiber for your applications. You should maintain a standard connector through a fiber optic project.
:: The components of a fiber connector
For most fiber optic connectors, the main components are ferrule, the body of the connector, the connector cover and strain relief boot.
Ferrule
The ferrule is the central part of the connector. It contains fiber optics in a hole in the center. Ferrule can be made of ceramic (zirconia) Stainless Steel or composite material.
Ceramic barrel is the most popular material because it has characteristics of stable temperature. The most common is zirconia ceramic is a hard white ceramic. ceramic ferrule is used for both single mode and multimode connectors. It offers the most low insertion loss and better repeatability.
Connector Body
fiber optic connector body may be steel or plastic. The design of the body differs from connector to connector. The connector body provides the mechanism to hold the ferrule and parts of others together. It also provides the mechanism for locking the mating connector. The most common locking mechanisms are push-pull, snap-in, wire and turn it.
Connector Cap
connector cap often has the same material as the body: steel or plastic. The cap can be screws, twist or snap-on connector for mating.
Cleat startup
strain relief boot is the part connecting the connector body and the fiber cable. It is often made from rubber. Although it seems small, it is actually one of the most critical parts in a connector. It provides relief of strain on the fiber optics to prevent micro-bending, the support of mechanical failures and provides fiber and handling of the connector.
:: Types Legacy fiber connector
The following list shows the types of connectors that were inherited deployed in fiber optic networks for many years.
ST Connector
ST connector was once the most popular fiber connector. He was appreciative of both single mode and multimode fiber connections. The insertion loss using an ST connector is about 0.5 dB.
ST connector has a twist on the locking mechanism, which is not likely to release in a vibrating environment. It is most often used in LANs.
FC connector
FC connector is popular for applications in simple mode. It has the lowest insertion loss and better repeatability. It has a thread on the locking mechanism.
SMA
SMA is a very old type of connector that is used primarily for multimodal applications. Today, it is still ongoing using medical equipment.
There are two types of SMA connectors on the market: ADM 905 and ADM 906. The only difference between them is that SMA 906 has a right while ADM ring 905 has a step-down tip.
D4 Connector
D4 NEC probably was the first connector to use ceramic or hybrid ceramic / stainless steel tips. It uses a small ring of SC or CSF. It has been widely used in telecom networks in the 80s to early 90s and some may still be used.
FDDI Connector
Besides the SC Duplex, you can sometimes see FDDI duplex connectors which mate to their specific networks. They are generally used to connect equipment into a wall outlet, but the rest of the network will be ST or SC connectors. As they both use the tips of 2.5 mm, they can be mated to SC or ST connectors with adapters.
Biconical connector
biconical connector versions mutlimode yellow body indicating a version SM – were usually black. biconical connector was developed by a team led by Jack Cook at Bell Labs in Murray Hill, NJ.
About the Author
Colin Yao is an expert on fiber optic networking technologies and products. Learn more about
bulk single mode fiber
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[Power98 SMA 2008] Jack & Rai – Fa La La Song