SFP Optical Module Features
SFP optical modules, SFP packages – hot-swappable small package modules, currently have a maximum speed of 400G. Most SFPs use LC interfaces. SFP is the abbreviation of SMALL FORM PLUGGABLE English, which can be simply understood as an upgraded version of GBIC. The SFP optical module is half the size of the GBIC optical module, and can be configured with more than double the number of ports on the same panel. For other functions, the basics of the SFP module are the same as the GBIC. Therefore, some switch manufacturers refer to SFP optical modules as miniaturized GBICs (ie, MINI-GBIC).
The components of an SFP optical module are:
Laser: Includes transmitter TOSA and receiver ROSA
Circuit board IC,
External accessories are: housing, base, PCBA, pull ring, snap, unlocking, rubber stopper,
In addition, in order to facilitate the identification, the parameter type of the module is generally identified by the color of the pull ring. For example, the black pull ring is multimode, the wavelength is 850 nm; the blue is the module with the wavelength of 1310 nm; the yellow is the module with the wavelength of 1550 nm; the purple is the module with the wavelength of 1490 nm.
SFP optical module classification:
1, according to the rate of 155M/622M/1.25G/2.125G/4.25G/8G/10G/40G/100G/400G, 155M, 1.25G, and 10G are currently used in the market, 100G technology is gradually maturing Demand is developing in an upward trend and is also the main optical module product in the future.
2. According to the wavelength, there are 850nm/1310nm/1550nm/1490nm/1530nm/1610nm, the wavelength is 850nm for SFP multimode, and the transmission distance is below 2KM. Commonly, it is like GLC-SX-MM of Cisco; the wavelength is 1310/1550nm. Single mode, the transmission distance is above 2KM, relatively speaking, the price of these three wavelengths is cheaper than the other three.
If the bare module is not easily confused, the general manufacturer will distinguish the color of the pull ring. For example, the black pull ring is multimode and the wavelength is 850 nm; the blue is the module with the wavelength of 1310 nm; the yellow is the module with the wavelength of 1550 nm. Purple is a module with a wavelength of 1490 nm.
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