Welcome to our store Learn more

New collections added! Learn more

What is a fiber optical patch cable?

What is a fiber optical patch cable?

zhubinyan |

fiber optical patch cable (also known as fibre optic connector) is a fiber optical patch cable is fitted with connectors at both ends of the connector plug, used to achieve the optical path of the active connection; one end is fitted with a plug is known as pigtail. Optical Fiber Patch Cord (Optical Fiber Patch Cord/Cable) and coaxial cable is similar, except that there is no mesh shield. The centre is the glass core where the light propagates. In multi-mode optical fibre, the diameter of the core is 50μm ~ 65μm, roughly equivalent to the thickness of a human hair. The diameter of the core of a single-mode fibre is 8μm to 10μm, and the core is surrounded by a glass envelope with a lower refractive index than the core to keep the fibre inside the core. Outside is a thin plastic jacket to protect the jacket.


Fiber optic patch cords can be divided into common silicon fiber single-mode, multi-mode jumper according to the different transmission media, there are other such as plastic and other transmission media for the fiber optic jumper; according to the structure of the connector can be divided into the following forms: FC jumper, SC jumper, ST jumper, LC jumper, MTRJ jumper, MPO jumper, MU jumper, SMA jumper, FDDI jumper, E2000 jumper, DIN4 jumper, D4 patch cords and so on various forms. The more common fibre optic patch cords can also be divided into FC-FC, FC-SC, FC-LC, FC-ST, SC-SC, SC-ST and so on.

Single-mode fiber (Single-mode Fiber): Generally the fiber optic patch cord is indicated in yellow, and the connector and protective sleeve are in blue; the transmission distance is longer.

Multi-mode Fiber: general fiber optic patch cords in orange, or grey, connectors and protective sleeve in beige or black; shorter transmission distance.

Attention to use

The transceiver wavelength of the optical modules at both ends of the fiber optic patch cord must be the same, that is to say, the two ends of the optical fiber must be the same wavelength optical modules, and the simple way to differentiate them is that the colour of the optical modules should be the same. In general, short-wave optical modules use multi-mode optical fibers (orange optical fibers), and long-wave optical modules use single-mode optical fibers (yellow optical fibers) to ensure the accuracy of data transmission.

Do not over-bend and loop the optical fibre in use, as this will increase the attenuation of the light in the transmission process.

Always protect the fibre optic connector with a protective sleeve after use of the fibre optic patch cable, dust and oil will damage the coupling of the fibre optic.

If the optical fibre connector is dirty, you can use a cotton swab dipped in alcohol to clean it, otherwise it will affect the quality of communication.

1, the ceramic ferrule and ferrule end face of the fiber optic patch cord must be wiped clean with alcohol and degreasing cotton before use.

2, the minimum bending radius of the optical fibre is less than 30mm when used.

3, to protect the insert and insert end face, to prevent bruising, pollution, disassembly and timely dust cap.

4, when the laser signal transmission, please do not look directly at the end face of the optical fibre.

5, there are man-made and other irresistible factors should be replaced in a timely manner when the damage to the optical fibre jumper.

6, before installation, should carefully read the instructions, and in the manufacturer or distributor of engineers under the guidance of installation and commissioning.

7, fibre-optic network or system anomalies, you can use the troubleshooting method to test one by one. Test or troubleshooting jumper can be done first pass-off test, you can usually use a visible laser pointer on the entire fibre optic link to hit the light to judge. Or further use of precision optical fibre insertion loss back loss instrument, test its indicators, indicators in the qualified range, then the jumper instructions are normal, and vice versa is unqualified.


1. Low insertion loss

2. Good repeatability

3. Large return loss

4. Good interpolation performance

5. Good temperature stability

6. Strong tensile performance



Fiber optic patch cord products are widely used in: communication room, fiber to the home, local area network, fiber optic sensors, fiber optic communication system, fiber optic connection transmission equipment, national defence and war preparation. It is suitable for cable TV network, telecommunication network, computer optical fibre network and optical test equipment. Subdivided down to the main application in several aspects.

1. Optical fibre communication system

2.Optical fibre access network

3.Optical fibre data transmission

4.Optical fibre CATV

5.Local Area Network (LAN)

6.Test Equipment

7.Fibre optic sensors

Selection Guide

Fiber optic patch cords are mainly of the following three types according to the termination type: ST-ST, SC-SC, ST-SC. There are mainly two types of single-mode fibre and multi-mode fibre according to the type of fibre. Patch cord length specifications are 0.5m, 1m, 2m, 3m, 5m, 10m and so on. According to the cable outer sheath material can be divided into ordinary type, ordinary flame retardant type, low-smoke halogen-free type (LZSH), low-smoke halogen-free flame retardant type and so on.

According to the fire rating of the building and the fire resistance requirements of the material, the integrated wiring system should take appropriate measures. In flammable areas and building shafts to lay cables or optical cables, fire-retardant cables and optical cables should be used; in large public places it is desirable to use fire-retardant, low-smoke, low-toxicity cables or optical cables; adjacent equipment or handover between the fire-retardant wiring equipment should be used.

Fibre optic patch cord and fibre optic pigtail difference

Fiber optic patch cords are used to make jumper cables from equipment to fiber optic cabling links. It has a thicker protective layer and is generally used in the connection between the optical terminal and the terminal box.

Pigtail, also known as pigtail, only one end has a connector, while the other end is a fiber optic cable core break, through the fusion splicing and other fiber optic cable core is connected, often in the fiber optic terminal box, used to connect the fiber optic cable and fiber optic transceiver (between the coupler, jumper, etc. also used).

Fiber optic connector is a removable (movable) between the optical fiber and optical fiber connection device, it is the two end faces of the optical fiber precision butt joints, in order to launch the optical fiber output of optical energy can be maximally coupled to the receiving optical fiber to go, and to make its intervention in the optical link and the impact on the system to a minimum, which is the basic requirements of the fiber optic connector. To a certain extent, the fibre optic connector also affects the reliability and performance of the optical transmission system.