Polish type: APC/PC/UPC Fiber Optic Connectors Optical fiber connectors such as SC, LC and FC are compatible with both single mode and multimode fiber cables.įC, SC, ST fiber connectors are 2.5mm Ferrule Diameter, on the other hand, LC, MU, E2000 are 1.25mm Ferrule Diameter as shown below. the core is 9 µm and the cladding is 125 µm) that provides higher transmission speeds and longer distances compared to multimode fiber. Single mode fiber uses a 9/125 connector, which refers to the core and cladding diameter of the optical fiber (i.e. while multimode means the fiber can propagate multiple light modes. Single-mode optical fiber has a small core diameter through which only one mode will propagate. Transmission media: Single Mode vs Multimode Fiber The commonly used are FC, SC, ST, LC,MTP/MPO connectors and MT-RJ, MU, DIN,E2000,Biconic,FDDI,Deutsh 1000,SMA,Volition Opti-Jack fiber optic connectors are less popular now, which will be described in detail in the following. ST/SC/FC/LC/MU/E2000/SMA/DIN/BICONIC connectors often use single fiber connectors,MT-RJ/VF-45/Optci-Jack/FDDI/ESCON are use duplex fiber connectors, MTP/MPO connector is a little bit different, they use Multiple fibers, as shown in the picture below. Simplex connectors usually connect a glass or plastic optical fiber, while duplex optical fiber connectors need to connect two optical fibers. Therefore, there are transmitters and receivers at both ends of a full duplex system. This allows one fiber to transmit from point A to point B, and another fiber to transmit from B to A. On the other hand, a full duplex system uses two optical fibers for communication. One side is the transmitter and the other side is the receiver, which is irreversible. While there are many different types of fiber connectors,which can be classified according to different standards such as Fiber Count, Connection methods, Transmission media, and Polishing types.įiber Count: Simplex vs Duplex Fiber vs Multiple fiber ConnectorsĪccording to the ITU-T definition, a simplex fiber is a fiber in which signals can only flow in one direction at a time. The optical fiber connector must be able to be used normally under the temperature of -40☌~+75☌.īasically, optical fiber connectors can be plugged and unplugged more than 1,000 times.Įnvironmental and Mechanical Performance (FC, SC, ST, LC, MU) The fiber optic connector generally requires a tensile strength not lower than 90N. Generally, the same type of optical fiber connectors can be used in any combination and can be used repeatedly, and the loss is generally less than 0.2dB. Optical fiber connectors are universal passive components. In practical application, the surface of pin is specially polished, which can make the return loss bigger, generally not less than 45dB. Return Loss (RL): refers to the ability of the connector to suppress the reflection of link optical power, and its typical value should not be less than 25dB. The smaller the insertion loss, the better, and the value should generally not exceed 0.5dB. Insertion Loss(IL): It is the connection loss, which refers to the loss of the effective optical power of the link. Optical properties: Includes insertion loss and Return loss Optical performance is the most important characteristic of optical fiber connectors,In addition, interchangeability, repeatability, tensile strength, temperature, and plug-in times should also be considered. the ferrules is usually made of ceramic, metal, or high-quality plastic.Ĭonnector Body: It is a plastic or metal structure used to fix the ferrule and attaches to the jacket and strengthens the fiber cable itself.Ĭoupling Mechanism: It is a part of the connector body which fixes the connector in place when connected to another device, It may be a latch clip, a bayonet-style nut, or similar device. It has a hollowed-out center that can hold the fiber tightly. The optical fiber connector is composed of three main components: the ferrule, the connector body and the coupling mechanism.įerrule: it is a thin structure that actually fixes the glass fiber. In the 1970s, the ferrule was composed of metal or hard plastic, after decades of development, ceramic ferrules were introduced to improve alignment and provide lower insertion loss performance, lower cost, higher density, and easy to terminate. Optical fiber connector is a device for detachable (movable) connection between optical fibers,It precisely connects the two end faces of the optical fiber to maximize the coupling of the optical energy into the receiving optical fiber and minimize the impact of the optical link on the system.įiber optic connectors include plugs that feature a ferrule that holds the fiber in place and an associated adapter for aligning and mating fibers to form a connection point.
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