The difference between optical modules and fiber optic transceivers

With the development of science and technology, the requirements for communication technology are getting higher and higher, and optical fiber has become the first choice for people in communication laying due to its advantages of fast transmission speed, long distance, safety and stability, and anti-interference. We often see long-distance data transmission requirements in building intelligent projects, basically using optical fiber transmission.

Optical Modules and Optical Transceivers

However, there are still many things that need to be paid attention to about how to link the optical fiber and the optical module.

1. An optical module is a functional module, or an accessory. It is a passive device that cannot be used alone. It can only be used in switches and devices with optical module slots. Optical transceivers are functional plug-ins and are separate active devices. The device, plus the power supply, can be used alone;

2. The optical module itself can simplify the network and reduce the failure points, and the use of optical fiber transceivers will increase a lot of equipment, greatly increase the failure rate and occupy the storage space of the cabinet, which is not very beautiful;

3. The optical module supports hot swap, and the configuration is relatively flexible; the optical transceiver is relatively fixed, and it is more troublesome to replace and upgrade than the optical module;

4. Optical modules are more expensive than fiber optic transceivers, but they are much more stable and less prone to damage; while fiber optic transceivers are much more economical and applicable, but need to consider many factors such as adapters, light status, network cable status, etc. The transmission loss accounts for 30% about;

5. Optical modules are mainly used for optical interfaces of optical network communication equipment such as aggregation switches, core routers, DSLAM, OLT and other equipment, such as: computer video, data communication, wireless voice communication and other optical fiber network backbone networks; optical transceiver applications In the actual network environment that cannot be covered by Ethernet cables and must use optical fibers to extend the transmission distance, it is usually located in the access layer applications of the initial metropolitan area network, such as: high-definition video image transmission for monitoring and security engineering and the last mile of optical fiber lines. connection to the metropolitan area network and further outer networks;

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In addition, several points need to be paid attention to when connecting the optical fiber module and the optical fiber transceiver: the wavelength and transmission distance must be the same, for example, the wavelength is 1310nm or 850nm at the same time, and the transmission distance is 10km; the fiber jumper or pigtail must be connected with the same interface. The transceiver adopts the SC port, and the optical module adopts the LC port. This point will prompt the choice of interface type when purchasing. At the same time, the speed of the optical fiber transceiver and the optical module must be the same. For example, the gigabit transceiver corresponds to the 1.25G optical module, the 100M connection is 100M, and the gigabit is connected to the gigabit; the optical fiber type of the optical module must be the same.