Nowadays, as the core optoelectronic device in the optical communication network, the types of the optical module is increasing, and its functions also becoming more and more complicated. Different types of optical modules are emerging such as SFP, SFP +, XFP, QSFP, GBIC and BIDI. We’ll take SFP optical module which is commonly used in the market as an example to talk about the difference among these similar optical modules.

SFP optical module, which also known as small package pluggable optical module, and used in the telecommunications industry and optical communications. The interface of the SFP optical module is LC which the size is small, suitable for high-density cabling environment. Meanwhile, SFP has specifications that a variety of network electronic device vendors to support, mainly to support Gigabit Ethernet and fiber-optic network communications. The electrical interface of it is 20pin Gold-finger, data signal interface is basically same as SFF module’s.