What Is the Structure and Classification of MPO Optical Fiber Jumper

MPO (multi fiber push on) optical fiber jumper is composed of connector and optical cable. It is a kind of high-density optical fiber transmission jumper. MPO connector is one of MT series connectors. It is a multi-core and multi-channel plug-in connector. The plug cores of MT series are accurately connected with the guide pin (also known as pin pin pin) through the left and right guide holes with a diameter of 0.7mm on the end face of the plug core.Compared with other connectors, MPO connector is characterized by compact design and more jumper cores. MPO connector has the same size as SC connector, but can accommodate 12 or 24 optical fibers. Therefore, MPO can greatly save cabinet wiring space. At present, MPO connectors have 8-core, 12 core, 24 core, 48 core, 72 core and 144 core designs, among which 12 and 24 core MPO jumpers are more common. 40g mpo-mpo optical fiber jumper generally adopts 12 core MPO multimode plug-in core; For 100g mpo-mpo optical fiber jumper, 24 core MPO plug is generally used.

MPO optical fiber connector includes optical fiber, sheath, coupling assembly, metal ring, pin, dust cap, etc., and the pin part is divided into male head and female head. The male connector has two pin pins, while the female connector does not. The connection between MPO connectors is accurately aligned by pin pin. When docking the connector, the spring installed at the tail of the insert will provide a thrust to the insert to lock it with the adapter. There is a "key" on one side of the connector body, which can be divided into "concave convex" to limit the relative position of the connector, i.e. P1, P2, etc. There is a mark called "white dot" on the body side of the connector, which is used to specify the insertion side of the connector.

(brief structure diagram of MPO connector)Generally, an optical link needs two optical fibers to complete the whole transmission process. The polarity is the interconnection matching between the transmitting end (TX) and the receiving end (Rx) at both ends of the optical link.MPO polarity classification of three line sequences:

Type A: the fiber cores at both ends of the jumper are arranged in the same position, that is, 1 at one end corresponds to 1 at the other end, and 12 at one end corresponds to 12 at the other end. The key directions at both ends are opposite, and key up corresponds to key down.Structure and polarity classification of MPO optical fiber jumperType B (interleaved type): the fiber cores at both ends of the jumper are arranged in opposite positions, that is, 1 at one end corresponds to 12 at the other end, and 12 at one end corresponds to 1 at the other end. The orientation of key keys at both ends is the same, that is, key up corresponds to key up and key down corresponds to key down.

Type C (paired interleaved type): the MPO jumper of type C is a pair of adjacent core positions crossing, that is, core 1 at one end corresponds to 2 at the other end, and core 12 at one end is 11 at the other end. The orientation of key keys at both ends is also opposite, and key up corresponds to key down.Three polarity connection methods different polarity methods use different types of MPO backbone optical cables. However, all methods use duplex jumpers to form optical fiber links. TIA standard also defines two different types of LC or SC duplex optical fiber jumpers to complete end-to-end duplex connection: A-A (cross type) jumper and A-B (straight through type) jumper.Compared with other optical fiber connectors, MPO connector has the characteristics of small volume, high precision and high density. Its emergence has greatly improved the popularity of optical network and reduced the production cost. Therefore, MPO jumper is widely used in the environment where high-density integrated optical fiber lines are required in the wiring process, such as FTTx, 40 / 100gsfp, SFP and other transceiver modules or internal and external connection applications of equipment.

Yiyuantong is a national high-tech enterprise focusing on the R & D, manufacturing, sales and service of passive basic components of optical communication. The company's main products are three core optical passive basic components: optical fiber connector (high-density optical connector of data center), wavelength division multiplexer and optical splitter, which are widely used in the fields of optical fiber to home, 4G mobile communication, Internet data center, national defense communication and so on.Source: OFweek optical communication