How to classify fiber optic patch cords?

Division Based on fiber optic connector type

According to the different fiber optic connectors, fiber optic patch cords can be classified as MPO /MTP /LC /SC /FC /ST /MTRJ /MU/ E2000/ DIN fiber optic patch cords. Although these different types of fiber optic patch cords have similar components (consisting of connectors and fiber optic cables) and the same functions, their application scenarios differ due to their different characteristics and performance.

Fiber Optic Patch Cords

LC fiber optic patch cord

LC fiber optic jumper is one of the most commonly used fiber optic jumpers in optical networks. Because it uses an LC connector with a ferrule diameter of 1.25mm, its small size is very suitable for high-density wiring, so it is widely used in computer rooms and data centers. Nowadays, in order to meet the high-density and high-performance requirements of data centers, many suppliers have introduced LC fiber jumpers with superior performance, such as ultra-low insertion loss LC fiber jumpers, one-tube dual-core LC fiber jumpers, etc.
LC Unitube fiber optic pacth cord:One-tube dual-core LC fiber optic patch cord uses a specially designed LC uniboot connector, which allows bidirectional transmission of optical signals in a single optical fiber, providing more possibilities for high-density cabling. Compared with standard LC fiber optic patch cords, it can effectively increase space utilization by 50%, not only saving time and cost but also making wiring more convenient, especially suitable for places with limited space.

 

Fiber Optic Patch Cords

SC fiber optic patch cord

The SC fiber jumper uses a SC connector with a ferrule diameter of 2.5mm, which is twice the size of the LC connector, so it is also called a large square head connector (large square head fiber jumper). This optical fiber jumper adopts a push-pull structure, is plug-and-play, and has excellent performance. It is very suitable for telecommunications and data network systems, including point-to-point passive optical networks.

MPO/MTP fiber optic patch cord

MPO/MTP optical fiber jumper is one of the common optical fiber jumpers in current high-rate data communication systems, such as 40G/100G direct connection and interconnection. MPO/MTP fiber optic jumper is a fiber optic jumper that uses multi-core fiber optic connectors and can accommodate 6 to 144 optical fibers. It is currently the largest capacity fiber optic jumper. MPO/MTP fiber optic jumpers includes optical fibers, sheaths, coupling components, metal rings, pins (PIN pins), dust caps, etc. Among them, they are divided into poles due to the different arrangement positions of fiber cores and pins. Polarity A/Polarity B/Polarity C male/female fiber optic patch cords. Due to the different types of applicable applications, there are differences. Therefore, when selecting, you need to select the appropriate MPO/MTP fiber optic patch cord based on the actual link situation.

 

FC fiber optic patch cord

FC fiber optic patch cord is the first fiber optic patch cord to use ceramic ferrule connectors. Different from LC fiber optic patch cord and SC fiber optic patch cord, the connector it uses is a round spiral made of nickel-plated or stainless steel. type connector, use a threaded clip to secure it to the adapter or jack. Although the installation of FC fiber optic patch cord is more complicated, it is still a commonly used fiber optic patch cord for connecting optical time domain reflectometers. In the beginning, FC fiber optic patch cords were also used in telecommunications and data network systems, but with the introduction of LC fiber optic patch cords and SC fiber optic patch cords, they gradually exited the market.

ST fiber optic patch cord

ST fiber jumper is a fiber jumper developed and manufactured by AT&T after FC fiber jumper. ST optical fiber patch cord uses a bayonet connector with a spring-loaded ceramic ferrule (diameter 2.5mm). The insertion loss is about 0.25dB. It can be used for long-distance and short-distance applications, such as campus networks, enterprise networks, etc. However, in recent years, the market share of ST fiber optic patch cords and FC fiber optic patch cords has been gradually declining.

Fiber Optic Patch Cords
The above-mentioned five most common fiber optic jumpers currently have different connectors and popularity levels.

Division based on cable structure

Fiber optic patch cable can be divided into ribbon fiber jumpers and bundled fiber jumpers according to their different structures. Ribbon fiber optic patch cords use ribbon fiber optic cables composed of fiber optic ribbons, mostly in a flat shape. Due to their high fiber density, they can accommodate more fiber cores, thus greatly saving wiring costs and space. Fiber optic patch cords use bundled optical cables, which are usually composed of 0.9mm loose tubes or loose tube fibers. They are mostly round and are mainly used for indoor integrated wiring.

Fiber Optic Patch Cords

Division based on application environment

According to different application environments, fiber optic jumpers are divided into conventional fiber optic jumpers and reinforced fiber optic jumpers. Conventional optical fiber jumpers are characterized by being relatively lightweight and low-cost, and can meet the use of most indoor transmission equipment and the high-density wiring needs of data centers. Therefore, conventional optical fiber jumpers are also commonly used in daily life. Reinforced optical fiber jumpers are generally used in harsh outdoor environments such as underground passages and base station construction. Therefore, they usually need to be insect-proof, waterproof and high-temperature resistant to avoid damage and affect normal communications. In order to cope with harsh environments, people have developed different types of reinforced fiber optic jumpers based on usage scenarios, such as armored fiber optic jumpers, IP67 waterproof fiber optic jumpers, and FTTA remote jumpers.

Division based on sheath material

PVC and LSZH are commonly used sheath materials for fiber optic patch cords. Fiber optic jumpers made of PVC are relatively flexible and flexible to install at normal temperatures, and are usually used indoors, such as the laying of horizontal sub-wiring systems. Compared with PVC jumpers, LSZH (low-smoke halogen-free) fiber optic jumpers contain flame-retardant compounds and do not release toxic smoke when burned. They are often used in unventilated areas exposed to public places such as subways and tunnels.

Fiber Optic Patch Cords
Division based on fiber cores

According to the number of fiber cores, fiber optic jumpers can be divided into simplex (single-core) fiber optic jumpers and duplex (double-core) fiber optic jumpers. As shown in Figure 2, a simplex fiber optic patch cord usually consists of one optical fiber and a connector, which means that the signal can only be sent in one direction. For example, the signal can be transmitted from A to B through a simplex fiber optic patch cord, but It can no longer be transmitted in the reverse direction from B to A. Duplex fiber optic patch cord consists of two optical fibers and two connectors, which can realize reverse signal transmission. For example, the signal can be transmitted from A to B, and from B to A in the reverse direction.

Division based on optical transmission mode

According to the different optical transmission modes, fiber optic jumpers are divided into single-mode fiber optic jumpers and multi-mode fiber optic jumpers. Single-mode fiber optic patch cords can only transmit one mode of light, with small inter-mode dispersion, and are suitable for long-distance communications, while multi-mode fiber optic patch cords can transmit multiple modes of light at one time, with large inter-mode dispersion, and as the transmission distance increases, As it grows, the inter-modal dispersion intensifies, so it is more suitable for short-distance transmission.

 

Summarize

Nowadays, as networks tend to develop towards high speed, high density, high performance and other characteristics, MTP/MPO pre-terminated optical fiber patch cords are very popular in 40G/100G high-density data centers, while LC optical fiber patch cords are mainly used in 1G/10G Enterprise network, computer room cabling, etc. Faced with different types of fiber optic jumpers on the market (such as different application environments, composition structures, materials, etc.), you can choose according to the actual transmission situation. If you are not sure how to choose, you can seek professional help to avoid unnecessary losses as much as possible.

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