Optical fiber transceiver is an Ethernet transmission media conversion unit that exchanges short-distance twisted pair electrical signals and long-distance optical signals. According to its needs, it is mainly divided into single-fiber optical transceivers and dual-fiber optical transceivers.Next, we will introduce in detail what is a single-mode single-fiber/dual-fiber optical transceiver? What are the differences between single-mode single-fiber and single-mode dual-fiber optical transceivers? If you are interested, let’s take a look!

What is a single-mode single-fiber optical transceiver?

Single-mode single-fiber optical fiber transceiver, single-fiber equipment can save half of the optical fiber, that is, to achieve data reception and transmission on one optical fiber.

Single-fiber optical fiber transceiver: The data received and sent are transmitted on an optical fiber. As the name suggests, single-fiber equipment can save half of the optical fiber, that is, to receive and send data on one optical fiber, which is very suitable for places where optical fiber resources are tight. This type of product uses wavelength division multiplexing technology, and most of the wavelengths used are 1310nm and 1550nm. However, because there is no unified international standard for single-fiber transceiver products, products of different manufacturers may be incompatible when they are interconnected. In addition, due to the use of wavelength division multiplexing, single-fiber transceiver products generally have the characteristics of large signal attenuation . At present, most of the fiber optic transceivers on the market are dual-fiber products, which are more mature and stable, but require more fibers.

What is a single-mode dual-fiber optical transceiver?

The single-mode dual-fiber optical fiber transceiver, and the single-fiber bidirectional optical fiber transceiver type are photoelectric conversion equipment, which has the advantage of saving half of the fiber.

The single-fiber bidirectional optical fiber transceiver is a photoelectric conversion device that uses wavelength division multiplexing technology to send and receive data on an optical fiber, and converts network electrical signals and optical signals. Single-fiber bidirectional optical fiber transceivers have become more popular in recent years. The advantage is that it can save half of the optical fiber. There is no unified international standard for the lack of half of the optical fiber. The products produced by various manufacturers are generally compatible and have slightly worse stability than dual-fiber products. Currently, fiber optic transceivers on the market are still dominated by dual fiber products.

What is the difference between single-mode single-fiber and single-mode dual-fiber optical transceivers?

Single-mode multi-mode depends on the optical cable, single-fiber dual-fiber refers to one-core fiber transmission or two-core fiber transmission; single-mode refers to the use of single-mode optical cables, single-fiber transceivers use only one core, both ends Both are connected to this core, and the transceivers at both ends use different optical wavelengths, so optical signals can be transmitted in one core. The dual-fiber transceiver uses two cores, one for sending and the other for receiving, one end is transmitting and the other end must be inserted into the receiving port, that is, the two ends must cross.

In the specific application of single-mode and dual-mode, the amount of multi-mode is higher than that of single-mode, mainly in the wiring range below 500m, multi-mode can already meet, although the performance is not as good as single-mode. Single mode is used in environments above 500m or in environments with high bandwidth requirements, mostly in large-scale field applications such as enterprise level. Because the working stability and performance of optical fiber modules are much better than transceivers, in single-mode applications with high performance requirements, few companies use transceivers, but directly use modules instead.

Single fiber and dual fiber generally have two ports, and the two ports of dual fiber are relatively close. They are marked with TX and RX, one for sending and one for receiving, which are designated; the two ports for single fiber are generally P1, P2 indicates that both ports can send and receive separately, that is, one port is used to complete the sending and receiving, so it is called single fiber. The optical transceivers TX and RX represent receiving and transmitting. There are two types of optical transceivers: one is single-mode and the other is dual-mode. Just like a road with only single-lane lines, traffic may be congested. If it is a dual-line line, it will be much smoother, so it is obvious that dual-mode transceivers are stable better.

Single fiber means that only one fiber is used to connect two transceivers. Dual fiber is more common and requires two fibers, and the price of single fiber is slightly higher. The multi-mode transceiver receives multiple transmission modes, the transmission distance is relatively short, and the single-mode transceiver only receives a single mode; the transmission distance is relatively long. Although multi-mode is being eliminated, there are still many applications in monitoring and short-distance transmission because of the lower price. Multi-mode transceivers correspond to multi-mode optical fibers, and single-mode and single-mode correspond to each other. They cannot be mixed.