Parsing Fiber Optic Connectors

The network cabling industry’s fiber optic manufacturers over the last few decades have been on a constant mission to develop the better fiber connector. This means lower cost, lower dB losses, easier to terminate out in the field. There have been over 100 connectors developed over the years but a select few have stood the test of time and beat out their competition. Now, let’s talk about the most common fiber connectors as following:

A fiber optic connector terminates at the end of a fiber optic cable is used when you need a means to connect and disconnect the fiber cable quickly. A fiber splice would be used in a more permanent application. the connectors provide a mechanical connection for the two fiber cables and align both cores precisely so the light can pass through with little loss. There are many different types of connectors but many share similar features. Many connectors are spring loaded. This will push the fiber ends very close other so as to eliminate airspace between them, which would result in higher dB losses.

There are generally five main components to a fiber connector: the ferrule, the body, the coupling structure, the boot and the dust cap.

Ferrule: The ferrule is the small round cylinder that actually makes contact with the glass and holds it in place. These are commonly made of ceramic today but also are made of metal and plastic.

Body: This sub assembly holds the ferrule in place. It then fits into the connector housing.

Connector Housing: This holds all sub assembly parts in place and has the coupling that will connect to the customer’s equipment. The securing mechanism is usually bayonet, snap-in or screw on type.

Boot: This will cover the transition from the connector to the fiber optic cable. Provides stress relief.

Dust Cap: Just as it implies will protect the connector from accumulating dust.

There are many types of connectors on the market. The major differences are the dimensions and the method of connection to equipment. Most companies will settle on one type of connector and keep that as a standard across the board. It makes sense because all equipment has to be ordered with that specific connector type and to have 2 or 3 different connector types can get messy. For typical network cabling projects today LC is fast becoming the shining star of fiber connectors. LC is a small form factor connector which means it requires a much smaller footprint in your IT closet. Thus you can fit many more LC connectors into you fiber panels then say ST or SC connectors.

LC Connector

The LC connector was developed by Lucent Technologies, hence the LC. It is a Single Form Factor Connector that has a 1.25mm ferrule. The attaching mechanism is similar to an RJ-45 connector with the retaining clip. It is a smaller square connector, similar to the SC. LC connectors are often held together with a duplex plastic retainer. They are also very common in single mode fiber applications.

ST Connector

The ST connector was the first popular connector type to be used as a standard for many organizations in their fiber network applications. It has first developed by AT&T. Often called the “round connector” it has a spring loaded twist bayonet mount with a 2.5mm round ferrule and a round body. The ST connector is fast being replaced with the smaller, denser SFF connectors.

SC Connector

The SC connector is a push in/pull-out type connector that also has a 2.5 mm ferrule. It is very popular for its excellent performance record. The SC connector was standardized in TIA-568-A, and has been very popular for the last 15 years or so. It took a while to surpass the ST because of price and the fact that users were comfortable with the ST. Now it’s much more competitive with pricing and it is very easy install, only requiring a push in and pull out connection. This is very helpful in tight spaces. Simplex and duplex SC connectors are available. The SC was developed by the Japanese and some say stands for Standard Connector.

FC Connector

The FC connector you may find in older single mode installations. It was a popular choice that has been replaced by mostly ST or SC type connectors. It also has a 2.5mm ferrule. They have a screw on retaining mechanism but you need to be sure the key and slot on the connector are aligned correctly. FC connectors can also be mated to ST & SC’s through the use of an adaptor.

MT-RJ Connector

MTRJ stands for Mechanical-Transfer Registered Jack and was developed by Amp/Tyco and Corning. MTRJ is very similar to an RJ type modular plug. The connector is always found in duplex form. The body assembly of the connector is usually made from plastic and clips and locks into place. There are small pins present that guide the fiber for correct alignment. MTRJ’s also are available in male or female orientation. They are only used for multi-mode applications. They can also be difficult to test because many testers on the market do not accept a direct connection. You usually need to rig up a patch cord adaptor kit to make testing possible.

MU Connector

MU looks a miniature SC with a 1.25 mm ferrule. It’s more popular in Japan.

MT Connector

MT is a 12 fiber connector for ribbon cable. It’s main use is for preterminated cable assemblies and cabling systems. Here is a 12 fiber MT broken out into 12 STs.

MT connector is sometimes called a MTP or MPO connector which are commercial names.

Hopefully this guide may help you get an idea of what options are out there for your fiber optic connector needs.

As the best Chinese fiber optic products supplier, FiberStore Inc. supply a range of fiber connectors, fiber attenuatorsfiber optic switch and more. If you would like to know more about our products information, please pay attention our news or contact us directly.

Introduce of Ethernet to Fiber Optic Converters

Ethernet Media Converter is a device to convert and transmit Ethernet networks into Ethernet fiber optic networks. It can convert digital electric Ethernet signals to optical signals. Ethernet to fiber optic converter enable connections of UTP copper-based ethernet equipment over a fiber optic link to take advantage of the benefits of fiber which include:

a. Extending links over greater distances using fiber optic cable

b. protecting datafrom noise and interference

c. Future proofing your network with additional bandwidth capacity

Copper-based Ethernet connections are limited to a data transmission distance of only 100 meters when using unshielded twisted pair (UTP) cable. By using an ethernet to fiber conversion solution, fiber optic cabling can now be used to extend this link over a greater distance.

An Ethernet to fiber media converter can also be used where there is high level of electromagnetic interference or EMI which is a common phenomenon found in industrial plants. This interference can cause corruption of data over copper-based ethernet links. Data transmitted over fiber optic cable however is completely immune to this type of noise. An Ethernet to fiber optic converter therefore enables you to inter-connect your copper-ethernet devices over fiber ensuring optimal data transmission across the plant floor. By utilizing ethernet to fiber media converters, the benefits of fiber optic cabling can now be realized for copper-based ethernet infrastructures.

The advantages of Ethernet to Fiber Optic Converters

1. Protects your investment in existing copper ethernet-based hardware

2. Provides you with the flexibility to add fiber on a port-by-port basis

3. Enjoy the benefits of fiber without have to make wholesale changes

4. Fast ethernet or Gigabit ethernet to multi-mode or single mode

5. Ethernet to fiber and fiber back to ethernet links

6. Create copper-fiber connections with fiber switches

Media Converters for Ethernet fiber converter transforms the signal from a UTP/RJ45 ethernet link to one that can be used by a fiber transceiver. Media converters can connect to various optical fiber cable such as multimode, single mode or single strand fiber cable. Options exist for many distances to suit the needs of a particular ethernet to fiber application. And, fiber interface connectors can be dual ST, dual SC, dual LC or single SC type.

Ethernet to fiber media converter models that are best suited for enterprise and Service provider applications, offer an on-board processor that continuously monitors that both the copper and fiber connections are up. This functionality, generally referred to as “Link Pass-Through”, monitors the state of the link to the end devices and to ensure that each end-point knows whether the entire link is up or not. Some media converter products do not have this intelligence and simply “nail up” the link even though the remote copper device may be down or the fiber link broken. With Link Passthrough functionality available in all Perle Ethernet to Fiber Optic Converters, the network’s SNMP management system can be alerted when a fault occurs so that corrective action can take place.

The most common type of Ethernet Fiber Converter is one that is a standalone device (managed or unmanaged) with its own power adapter. They convert fixed speed Fast Ethernet, Gigabit or rate converting 10/100/1000 UTP links to 100Base-FX or 1000Base-X fiber connections. Where a large density of media converters are required, chassis-based systems are also available. These rack mountable units can house up to 19 managed or unmanaged media converter modules providing redundant power for AC and 48v DC environments.

FiberStore supply many types of Ethernet Media Converter, such as 10/100M BIDI WDM Ethernet media converter, 10/100M Ethernet media converter with SFP port or SC port. These media converters extend transmission distances well beyond the capabilities of twisted pair wiring, and can reach up to 2km, 20km, 40km, 60km, 80km, 100km, or 120km. Choose FiberStore Inc. for the right product to meet your fiber conversion project needs. FiberStore Inc. also provides fiber optic switch,fiber attenuators, MPO connector and more.