The classification and overview of optical fiber jumpers are as follows:
There are also many kinds of optical fiber jumpers (also called optical fiber connectors), that is, optical fiber connectors connected to optical modules cannot be used together. SFP module is connected with LC optical fiber connector, and GBIC is connected with SC optical fiber connector. The following details introduce several common optical fiber connectors in network engineering:
? ①FC-type optical fiber jumper: the external reinforcement method is metal sleeve, and the fastening method is turnbuckle. Usually used on ODF side (most commonly used in distribution frame)
②SC-type optical fiber jumper: the connector connected with GBIC optical module has a rectangular shell, and the fastening method is plug-in pin type, without rotation. (most commonly used in router switches)
③ST-type optical fiber jumper: it is commonly used for fastening optical fiber distribution frame, round shell and turnbuckle. (For 10Base-F connection, the connector is usually ST type. Usually used in fiber distribution frames)
④LC optical fiber jumper: The connector connected to SFP module adopts modular jack (RJ) locking mechanism, which is convenient to operate. (commonly used by routers)
⑤MT-RJ optical fiber jumper: a square optical fiber connector integrated with transceiver, with two optical fibers integrated at one end.
ST and SC connectors are usually used in general networks. After the ST head is inserted, it is fixed for half a turn with a bayonet, but it is easy to break. SC connector can be plugged and unplugged directly, which is very convenient to use. The disadvantage is that it is easy to fall out. FC connectors are generally used in telecommunication networks. There is a nut screwed on the adapter, which has the advantage of being firm and dustproof, but the disadvantage is that the installation time is slightly longer. The MTRJ optical fiber jumper consists of two high-precision plastic connectors and an optical cable. The exterior of the connector is a precision plastic part, including a push-pull plug-in clamping mechanism. Suitable for indoor applications of telecommunication and data network systems.
Optical fiber module: generally supports hot plug, and the optical fiber interfaces used by GBIC are mostly SC or ST type; SFP, or GBIC in small package, uses LC-type optical fiber.
Optical fiber used:
Single mode: l wavelength 13 10 single mode long-distance LH wavelength 13 10, 1550.
Multi-mode: SM wavelength 850
SX/LH means that single-mode or multimode fiber can be used.
We can often see "FC/PC" and "SC/PC" in the label of pigtail connector, and their meanings are as follows.
The front of 1 "/ "indicates the connector model of the pigtail.
"SC" joint is a standard square joint, which is made of engineering plastics and has the advantages of high temperature resistance and difficult oxidation. SC connectors are usually used for optical interfaces on the transmission equipment side.
The shape of "LC" joint is similar to that of SC joint, but smaller than that of SC joint.
"FC" connector is a metal connector, which is generally used on the ODF side. Metal connectors are plugged and unplugged more often than plastic connectors.
There are many kinds of connectors, besides the three mentioned above, there are, ST, MU and so on.
2./' indicates the cross-sectional technology of optical fiber joint, that is, grinding method.
"PC" is widely used in the equipment of telecom operators, and its connector section is flat.
"UPC" has less attenuation than "PC" and is generally used for equipment with special needs. Some foreign manufacturers use FC/UPC to jump fibers inside ODF racks, mainly to improve the index of ODF equipment itself.
In addition, "APC" model is widely used in broadcast TV and early CATV, and its tail fiber head adopts inclined end face, which can improve TV signal quality. The main reason is that the TV signal is modulated by analog light. When the coupling surface of the connector is vertical, the reflected light returns along the original path.
Because the uneven refractive index distribution of optical fiber will return to the coupling surface again, although the energy is very small at this time, because the analog signal can not completely eliminate the noise, it is equivalent to superimposing a weak signal with time delay on the original clear signal, which is reflected in the picture as a ghost. The tilt angle of pigtail headband can make the reflected light not return along the original path. General digital signals generally do not have this problem.
Scope of use:
Optical fiber communication system
B: optical fiber broadband access network
C: optical fiber cable TV
D: local area network LAN
E: list of optical fiber instruments
optical fibre sensor
Optical fiber teaching data transmission system
H: test equipment
This is the end of the introduction of optical fiber connectors, and more related resources and contents will continue to be arranged and provided by this site.