2024-04-12
With the rapid advancement of FTTH (fiber to the home) technology, the demand for optical fiber pigtails has shown an increasing trend. Due to different interface types, fiber optic pigtails can be subdivided into various types such as LC fiber optic pigtails, SC fiber optic pigtails, FC fiber optic pigtails, and ST fiber optic pigtails. In this article, we will focus on fiber optic pigtails with SC interfaces, and deeply explore their single-mode and multi-mode characteristics, connector ferrule grinding types, and comprehensive solutions for splicing and connection.
SC optical fiber pigtail, also often called SC optical fiber pigtail, has SC/PC optical interface and is a special optical fiber connection device. One end is designed with an SC/PC connector for easy connection to a fiber optic transceiver or optical module (sometimes it needs to be used with a coupler, jumper, etc.). The other end appears as a broken end of the optical cable core. This end is mainly connected to other optical cable cores through fusion splicing technology to realize the transmission of optical signals. In optical fiber networks, SC optical fiber pigtails often appear in optical fiber terminal boxes and optical fiber splice trays. They work together to build an efficient optical data transmission path to ensure stable and rapid transmission of optical signals in the optical fiber network.
Single-mode SC optical fiber pigtail is a special optical fiber connection device designed for long-distance optical signal transmission. Usually, the appearance of this pigtail is yellow to distinguish it from multimode pigtails. In single-mode pigtails, optical signals are transmitted in a single mode, ensuring stability and efficiency during long-distance transmission. In particular, OS2 type SC single-mode optical fiber pigtails have been widely used in the next generation 40G/100G Ethernet standards due to their excellent performance, gradually replacing OS1 type pigtails.
Multimode SC optical fiber pigtail is another common optical fiber connection device, mainly used for short-distance optical signal transmission. This type of pigtail usually appears aqua blue for easy identification. Multimode pigtails support the transmission of optical signals in multiple modes, making it excellent in short-distance interconnect scenarios. Multi-mode OM optical modes have multiple levels, such as OM1 to OM4. Each level corresponds to a different wavelength range, ranging from 850nm to 1550nm, to meet the transmission needs in different scenarios.
The connector of SC optical fiber pigtail is designed as a standard square shape and is made of high-quality engineering plastics with excellent high temperature resistance and anti-oxidation properties. This type of connector is widely used on network equipment such as routers or switches. Regarding the connector ferrule grinding types of SC optical fiber pigtails, they can be mainly divided into two types: APC and UPC. The end face of the UPC ferrule is mainly flat, while the end face of the APC ferrule adopts a chamfered design. Among them, the APC end angle type can control light return more effectively and improve the transmission quality of optical signals.
It is worth mentioning that the SC fiber optic pigtail connector is not only affordable, but also very convenient to plug in and out without rotating. Its insertion loss fluctuation is small, the compressive strength is high, and the installation density is high, so it has become a more commonly used fiber optic connector. Whether in the field of network cabling or optical fiber communications, SC optical fiber pigtails have demonstrated their superior performance and wide application prospects.
The splicing and connection of SC fiber pigtails is a precise and important process. First, for the fusion part, we need to peel off the outer skin of one side of the unterminated connector of the laid optical fiber and the SC fiber pigtail, cut and clean it. These processed fibers are then inserted into splice mating trays, precisely aligned, tangentially aligned, and locked to ensure a stable connection. In addition, we can also use auxiliary tools to peel off the outer skin of the optical fiber and pigtail, cut and clean them, and then use an optical fiber fusion splicer to "melt" them together under the protection of the splicing disk to achieve a seamless connection.
As for the connection part, the separate optical fiber head at the other end of the pigtail is connected to the optical fiber transceiver or optical module to realize the connection between the optical fiber and the twisted pair. In this way, the optical signal can be successfully transmitted to the information socket, completing the entire communication link.
During the fiber splicing process, we will use a series of professional tools, including optical terminal boxes, fiber optic transceivers (optical modules), pigtails, couplers, special wire strippers, fiber cutters, etc. These tools not only help us efficiently complete optical fiber splicing and connection, but also ensure the quality and stability of the connection, providing a solid foundation for optical fiber communications.
Optical fiber pigtails play an indispensable role in various types of network access equipment. It can realize interconnection and cross-interconnection functions and is widely used in optical fiber CATV networks, FTTH/FTTX, telecommunications networks, pre-terminated installations, etc. In this field, it provides a stable, high-speed and effective operating environment for optical fiber data transmission and LAN/WAN networks. Next, we will focus on the connection scheme between SC fiber pigtail and optical cable.
The connection steps are as follows:
First, we accurately splice the outdoor optical cable and SC optical fiber pigtail in the optical fiber terminal box to ensure that the optical signal can be transmitted seamlessly. Then, the fused optical fibers are led out through jumpers to prepare for subsequent connections.
Next, we connect the other end of the fiber optic jumper to the fiber optic transceiver. This step is crucial because it converts optical signals into electrical signals, allowing the signals to flow smoothly in different transmission media.
At this time, the optical fiber transceiver leads to electrical signals. In order to continue transmitting these signals, we need to use twisted pair jumpers as the transmission medium. The interface through which the twisted pair jumper is connected to the network device is usually a standard RJ-45 interface, thus completing the conversion process of the photoelectric signal.
It should be noted that if we need to connect the optical fiber jumper to the network, it also needs to be used with optical modules and switches. In this way, the conversion of optical signals into electrical signals can also be realized, ensuring the stable transmission of network signals.
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