What is the difference or connection between SFP+ optical module and SFP and XFP?

The 10G optical module has undergone development from 300Pin, XENPAK, X2, and XFP, and finally realizes the transmission of 10G signals in the same size as the SFP. This is SFP+. With its advantages of miniaturization and low cost, SFP+ meets the high density requirements of optical modules for equipment. From the implementation of standards in 2002, by 2010 it has replaced XFP as the mainstream of the 10G market.

The difference between SFP+ and SFP:

(1) SFP and SFP+ have the same dimensions;

(2) SFP protocol specification: IEEE802.3, SFF-8472;

The difference between SFP+ and XFP:

(1) SFP+ and XFP are 10G fiber modules and can communicate with other types of 10G modules;

(2) SFP+ is smaller than XFP;

(3) Because of its smaller size, the SFP+ changes the signal modulation function, serializer/deserializer, MAC, clock and data recovery (CDR), and electronic dispersion compensation (EDC) function from the module to the motherboard card;

(4) XFP compliance agreement: XFP MSA agreement;

(5) SFP+ compliant protocols: IEEE 802.3ae, SFF-8431, SFF-8432;

(6) SFP+ is a more mainstream design.

(7) SFP+ protocol specification: IEEE 802.3ae, SFF-8431, SFF-8432.