There are many types of fiber optic adapters, and the heads of the various interfaces we commonly use are dazzling. How can we quickly identify those joints?
This time we list the common FC, SC, LC, ST interfaces for you to identify
SC interface: blue generous port
Its shell is rectangular, and the structure dimensions of the pins and coupling sleeves used are exactly the same as those of the FC type. Among them, the end faces of the pins are mostly PC or APC-type grinding; the fastening method is the plug-in pin-bolt type, which does not need to be rotated. Equipped with metal shrapnel, it is convenient for concealed installation. This type of connector is cheap, easy to plug and unplug, has small fluctuations in insertion loss, high compressive strength, and high installation density.
FC interface, circular threaded interface
The external strengthening method is a metal sleeve, and the fastening method is a turnbuckle. The FC type connector adopts the butt end of the ceramic pin. This type of connector is simple in structure, easy to operate, and easy to manufacture, but the fiber end is more sensitive to dust and prone to Fresnel reflection, making it difficult to improve return loss performance. Later, this type of connector was improved by adopting a contact pin (PC) with a spherical butt end surface, and the external structure remained unchanged, which greatly improved the insertion loss and return loss performance.
ST interface, round with buckle
It is a snap-on locking structure with a key to ensure accurate alignment during connection. It has strong tensile strength. The metal key is positioned to improve the repeatability and durability of the adapter. It uses a precision ceramic or copper sleeve to ensure Long-term stable mechanical and optical properties. Rectangular structure, easy to install and use by tapping and riveting.
LC interface: small blue square port
Made with an easy-to-operate modular jack (RJ) latch mechanism. The size of the ferrule and the sleeve adopted is small, and the density of the optical fiber connector in the optical fiber distribution frame is improved. Adopt precision ceramic sleeve to ensure long-term stable mechanical and optical performance.
