Where are the application of single/multimode fiber and single/multimode optical module?

(1) Single-mode fiber can make the fiber be directly transmitted to the center, and is generally used for long-distance data transmission; in multi-mode fiber, optical signals propagate through multiple channels, so multi-mode fiber is often used for short-distance data transmission.

(2) Single-mode optical modules are often used in long-distance and relatively high transmission rate metropolitan area networks; multi-mode optical modules are used in short-distance transmission

Can single-mode/multi-mode optical fibers be mixed with single-mode/multi-mode optical modules?

Normally, the normal operation of the fiber and the optical module can be confirmed only by matching the fiber and the optical module. Although a single module can work on a multimode fiber, there will be a lot of packet loss, so you still need to pay attention to the matching of the fiber and the optical module.

Can multi-mode fiber and single-mode optical module be used together?

No, in the test result table above, we can see that a single module on a multimode fiber seems to be able to work in a short distance, but in fact its working effect cannot be guaranteed. Therefore, it is better to use a multimode fiber with a multimode optical module. Used together, because the multi-mode and single-mode converters must have the corresponding wavelength and optical transceiver function to achieve the photoelectric conversion function and effect.

Summary: Finally, let’s summarize that the difference between single/multimode fiber is mainly in the transmission distance, transmission mode and cost; single/multimode optical modules need to be used with optical fibers and cannot be mixed.