XFP transceiver belongs to 10G optical module, with LC connector, the maximum transmission is 80KM. XFP (10 Gigabit Small Form Factor Pluggable) is a hot-swappable optical transceiver, independent of the communication protocol, usually the size is 850nm, 1310nm or 1550nm for the 10G bps SONET / SDH, Fibre Channel, gigabit Ethernet, 10 gigabit Ethernet and other applications, including DWDM link. XFP contains similar SFF-8472 digital diagnostic modules, but extended to provide a robust management tools. XFI electrical interface specification is part of the XFP Multi Source Agreement specifications. XFP developed by the XFP Multi Source Agreement Group.
The optical transceiver is actually just a photoelectric conversion device, only responsible for the completion of the optical / electrical signal conversion, other functions, such as multiplexing / demultiplexing, 64B/66B codec by the chip implementation of the circuit board. XFP optical module can easily achieve high port density applications, XFP occupied area of only the Xenpak the 20% of the printed circuit board (PCB), the power consumption is only 1.5 to 2 W, can be used to achieve up to 16-port line card.
XFP interface with the circuit board using the 10G serial circuit interface (XFI-). Now provided by the manufacturer XSBI-to-XFI and XAUI-to-XFI chip, the XGMII-to-XFI chip manufacturers in the development.
Because XFP just an optical transceiver, so has nothing to do with the protocol can be generally applied to 10G Ethernet 10GFC and OC-192 SDH, universality of application conducive to equipment manufacturers increase purchases, so as to achieve the purpose of reducing costs. Addition, XFP provides a two-wire serial interface, can achieve the data diagnosis function, real-time monitoring of the optical module of various parameters, such as temperature, the laser bias current, transmitted light power, the received optical power, working voltage, etc..
XFI electrical interface specification is part of the specification of the XFP Multi Source Agreement by the XFP Multi Source Agreement Group development. In recent years, due to the speed of the fiber-optic network, the 10G XFP optical module applications become increasingly widespread.
Reference: XFP Transceiver Wiki