The Transceivers in Fiber Optics
Fiber Optic Transceiver
An fiber optic transceiver contains two parts---a transmitter and a receiver which were placed on each end of the fiber. The transceiver can work in duplex ways by transmitting signals on fibers in one and the reverse direction. It is widely used in optical communication since it effectively uses a laser diode or LED to input an electrical signal and then output the signal as an optical one. And, only by a well-matched input of the transmitter and the output of the electrical signal can the data link performs efficiently. Now, the optical transceiver is well accepted by the worldwide market of fiber communication.
GBIC
GBIC refers to the gigabit interface converter which serves as the standard for transceivers and was widely adopted in Ethernet system and fiber optics. It is a kind of transceiver that offers conversion between electric currents and optical signals with a rather high speed networking and communication. As it employs a great amount of optical technologies, more flexibility and convenience were offered to the administrators for purchasing and storing. The GBIC transceiver is a plug-in module that makes it easier to deal with the conversion of the communication networks.
SFP
The SFP refers to the small form-factor pluggable, which is a smaller size of GBIC and can also be called as “mini-GBIC”. It can be applied into telecommunication and data communication as well. The SFP transceiver connect a network switch and the Fiber Channel and Gigabit Ethernet optical fiber cables. It works just like the GBIC to convert electrical signals to optical ones but turns out to be a better form of the GBIC. Information which is relevant to ID and system can be storied in the SFP. Be appropriately chosen, the SFP module enables the electrical port to connect to fibers of different types and wavelength.
SFP+
The SFP+ is an advanced version of the former SFP that the data rates based on it can reach up to 16 Gbit/s and has becoming a rather popular industry format that is supported by worldwide network component manufacturers. The SFP+ operates faster and can be used at 16G Fiber Channel which differentiates from the 8G mostly in its encoding method. So the SFP+ is far more efficient with a 64b/66b encoding comparing with the 8b/10b used for 8G. Besides, unlike the earlier XENPAK or XFP modules, SFP+ modules leave more circuitry to be implemented on the host board instead of inside the module.
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