Overview of SFP (Small Form - factor Pluggable)
SFP module is a small pluggable optical communication module, mainly used in optical fiber communication system, to achieve photoelectric conversion function, can convert electrical signals into optical signals to send out, and can also convert the received optical signals into electrical signals. This kind of module is widely used in network equipment such as switches, routers, and fiber optic transceivers to meet the network connection requirements of different distances and bandwidths.
Main function of SFP
Provide photoelectric-electro-electro-optic conversion capability. It consists of two parts: the transmitting part and the receiving part. The transmitting part converts the electrical signal into an optical signal. The receiving part converts the optical signal into an electrical signal.
Key Features:
| Class B+ | Class C+ | Class C++ | Class C+++ | Class C++++ | |
| Distance | 10km | 20km | 40km | 80km | 120km |
| Output Power | -5 dBm to -1 dBm | ||||
| Overload Power | -3 dBm to 0 dBm | ||||
| Receiver Sensitivity | -28 dBm to -23 dBm | -31 dBm to -26 dBm | -34 dBm to -29 dBm | -37 dBm to -32 dBm | -40 dBm to -35 dBm |
| Fiber Type | Single-mode fiber (SMF) | ||||
| Wavelength | 1310 nm | ||||
| Application | medium to long-distance connections in metro and access networks | longer-distance connections in metro and access networks | long-distance connections in metro and access networks, as well as some backbone applications | very long-distance connections in metro and backbone networks | ultra-long-distance connections in backbone networks and long-haul applications |
Classification of optical transceiver integrated modules
1.According to the package:
SFP: SmallForm-factor Pluggable transceiver, small package pluggable transceiver, the highest number rate can reach 4G, mostly using LC interface.
GBIC: GigaBit Interface Converter, hot-swappable Gigabit Ethernet interface converter with SC interface.
XFP: 10-Gigabit small Form-factor Pluggable transceiver 10 Gigabit Ethernet interface pluggable transceiver in a small package. 10G optical transceivers, which can be used in 10 Gigabit Ethernet, SONET and other systems, mostly using LC interfaces.
XENPAK: 10 Gigabit EtherNet Transceiver PAcKage 10 Gigabit Ethernet Interface Transceiver Integrated Package, 10 Gigabit Ethernet Applications with SC Interface.
2.According to the emission wavelength:
850nm, 1310nm, 1550nm, etc
3.According to the mode of use:
non-hot-swappable (1×9, SFF), hot-swappable (GBIC, SFP, XENPAK, XFP)
