How to Choose an Optical Transceiver?

An optical transceiver is composed of optoelectronic devices, functional circuits, and optical interfaces, optoelectronic devices include transmitting and receiving two parts. Simply put, the role of the optical transceiver is photoelectric conversion, the transmitting end of the electrical signal into optical signals, through the fiber optic transmission, the receiving end, and then the optical signal into electrical signals. Common Chinese names are optical transceiver, optical fiber transceiver, and optical transceiver. The next by the fly smooth technology of the small to introduce the classification of optical transceivers, take a look at it!

Optical transceivers are classified according to package form and rate, etc. Common classifications are 1X9, SFP, SFP+, XFP, QSFP+, CFP, GBIC, CXP, X2, Xenpak, CFP2, CFP4, DAC, AOC, etc.


SFP optical transceivers: transmission rates of 100 and Gigabit. Common rates are 155Mb/s, 622Mb/s, 1.25Gb/s, 2.5Gb/s, 3Gb/s.
SFP+ optical transceiver: transmission rate of 10Gb/s.
QSFP+ optical transceivers: transmission rates of 40G and 100G.
CFP, CFP2, CFP4 optical transceivers: transmission rates are mainly 40G and 100G.

DAC high-speed cable: copper cable material, transmission rate of 10G, 40G and 100G.

AOC high-speed optical cable: the transmission medium is optical fibre, the transmission rate is 10G, 40G and 100G.

When choosing an optical transceiver, the following 4 points are the key factors to consider.

1. Transmission distance: The transmission distance supported by different optical transceivers is different. Generally speaking, the transmission distance of multimode optical transceivers is much shorter and cheaper than that of single-mode optical transceivers, for example, the transmission distance of a 10GBASE-SR SFP+ optical transceivercan only reach 400m, while the transmission distance of a 10GBASE-LR SFP+ optical transceivercan reach For example, a 10GBASE-SR SFP+ optical transceivercan only reach 400m, whereas a 10GBASE-LR SFP+ optical transceivercan reach 10km. It is also important to take into account the attenuation and dispersion of the optical signal during transmission and it is recommended that you use an optical transceiverthat supports a slightly greater distance than you actually need. For short-distance connections between equipment in the rack, it is recommended that you use high-speed cable products that are less expensive than optical transceivers.
   
   2.transmission mode: optical transceivers mainly have three data transmission modes: simplex, half-duplex and full-duplex, simplex transmission only supports data transmission in one direction; half-duplex transmission allows data transmission in two directions, but at a certain moment only allows data transmission in one direction; full-duplex transmission allows data transmission in two directions at the same time. It is better to choose an optical transceiverthat supports full-duplex transmission.
   
   3.the transmission medium: copper and optical cable are currently more widely used two transmission media, therefore, some optical transceivers are electric port design, some optical transceivers are optical port design. Generally speaking, optical transceivers are commonly used in 10G and 40G Ethernet transmission applications, while electrical optical transceivers are used in 100 Gigabit and Gigabit Ethernet applications, and the transmission distance of optical transceivers is generally farther than that of electrical optical transceivers.
   
   4.Heat resistance: The working temperature of the optical transceivershould not be too high, if it exceeds the temperature that the optical transceivercan withstand, there is a high possibility of link failure. Therefore, you should choose the optical transceiverwith good heat resistance.
   
   Well, the above content is the fly smooth technology about optical transceiverrelated knowledge detailed explanation, hope it can help you!