PRIMUS IT Limited.
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A Few Questions About Fiber Transceivers

When we transmit over long distances, we usually use optical fibers to transmit. Because the optical fiber has a long transmission distance and anti-interference. Generally speaking, the transmission distance of single-mode fiber is more than 10 kilometers, and the transmission distance of multimode fiber can also reach 2 kilometers. In fiber optic networks, we often use fiber transceivers.

So, must fiber transceivers be used in pairs? Is the fiber transceiver divided into one for receiving and one for sending? Let's take a look at this.

Ⅰ. When using fiber transceivers, the following questions will come

1. Do fiber transceivers have to be used in pairs?

2. Is it possible to divide the fiber transceivers into one to send and the other to receive? Or just two fiber transceivers can be used as a pair?

3. If the optical fiber transceivers must be used in pairs, are they the same brand and model, or can be used in combination with any brand?

Ⅱ. Are fiber transceivers used in pairs? Is there a separate transmitter and receiver?

1. Do fiber transceivers have to be used in pairs?

In fact, fiber optic transceivers are generally used in pairs as photoelectric conversion devices, but the following use cases can also occur: fiber optic transceivers + fiber optic switches and fiber transceivers + 10G SFP transceiver10G transceivers are also normal.

In principle, optical fiber communication can be realized as long as the optical transmission wavelength and signal encapsulation format are the same and all support a certain protocol.

2. Does the fiber transceiver have a transmitter and a receiver?

Generally, single-mode dual-fiber (two fibers are required for normal communication) transceivers are not divided into transmitter and receiver. As long as they appear in pairs, they can be used. Only single-fiber fiber optic transceiver module (one line is required for normal communication) will have a sub-transmitter and a receiver.

3. Can different brands be used in combination?

Either dual-fiber transceivers or single-fiber transceivers should be used in pairs. Even if the fiber transceiver brands are different, as long as the speed, wavelength and mode are the same, they are compatible and interoperable.

For example, fast and gigabit, wavelength 1310nm and wavelength 1300nm cannot communicate with each other. In addition, even if they are of the same brand, a single-fiber transceiver and a dual-fiber pair cannot communicate with each other.

Ⅲ. What is a single fiber transceiver? What is a dual fiber optical transceiver?

The single-fiber transceiver uses a single-mode optical cable. The single-fiber transceiver uses only one core and both ends are connected to this core. The transceivers at both ends use different optical wavelengths, so they can transmit optical signals in one core.

Dual-fiber transceivers use two cores, one for sending and one for receiving. One end of the dual-fiber transceiver is to sent and the other end must be inserted into the receiving port, that is the two ends must be crossed.