Communications equipment on the most widely used is the FC type, SC type, ST type, LC type and MU type optical fiber connector, their common characteristics are in contact with each other optical port; wherein the LC type and MU type optical fiber connector is even and the new generation of small type sealing device ( small-form-factor SFF connector ), it appears to improve the fiber density. Multi core optical fiber connector application is to achieve a high density fiber solutions, the multi core optical fiber connector is MTRJ type, MPO type, MD type and MPX type, including MPO, MD, MPX type is mainly used for connecting an optical fiber ribbon, also known as fiber ribbon connector, the highest it is now single connector 24 fiber.
FC Ferrule Connector abbreviations, indicating its external reinforcement is a metal sleeve, fastening means for turnbuckles. FC metal connectors on the fiber core to provide good protection, but it is the rotation manner, on the fiber core is easy to cause scratches. The earliest, FC type connector, the ceramics contact pin docking end plane contact type ( PC ). The connector has the advantages of simple structure, convenient operation, easy fabrication, but the fiber end
In the face of dust are more sensitive, and easy to generate the Fresnel reflection, improves return loss performance more difficult. Later, on the type of connector is improved, the butt end with a spherical pin ( UPC ), while the external structure is not changed, the insertion loss and return loss can be greatly improved FC mode network the most common connection device, on the wiring frame for most. ODF side optical interface for general use FC connections, FC is a metal joint, but ODF has no problem of high temperature, the metal joint pluggable times than the plastic to be more than light, maintenance ODF pigtail pigtail to board. It uses 2.5 mm ferrule, but early in the FC connector part of product design for ceramic inside stainless steel ferrules. At present, in the majority of application FC is SC and LC connectors replacement.
SC Subscriber Connector / Standard Connector. Its shell is a rectangle, the pin and the coupling sleeve structure size and type FC exactly the same. In the end of the pin by PC or APC type abrasive manner; fastening means is the use of plug pin latch type, without rotating. A SC connection is engineering plastic, high temperature resistance, not easy to oxygen advantages.
The connector plug has the advantages of convenient operation, low price, small insertion loss fluctuation, high compressive strength, high mounting density. SC English name sometimes written as" Square Connector", because the SC shape is square shaped. It is an TIA-568-A standard connector, but early because the price is high ( ST price of two times ) but are not widely used. Industry transfer device side light interface generally use SC joint.
ST Straight Tip. It has a bayonet mount, and a 2.5 mm long cylinder of ceramic ( common) or polymer ferrule to hold the fiber. The ST connector available" pierce and rotation" ( Stab and Twist ) to memory, pierce and rotation is its connection method ( the line is inserted into the socket, then rotated outside tenon will lock ).