Brief introduction of 25G SFP28 Transceiver

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With the evolution of 5G
technology, equipment providers are responding with 25Gbps edge devices that
require more bandwidth than can be provided on a traditional 10Gbps interface.
25G SFP28 transceivers are the critical player among them. They come in various
types that cover different transmission distances.

25G SFP28 Transceiver Type and
Applications

25G Standard SFP28 Transceiver
Module

25G
SFP28 transceiver module can be classified into Short-Range (SR), Long-Range (LR)
transceivers and Extended-Range (ER) transceivers in terms of the transmission
distance. The SFP28 SR is mainly used with OM4 multimode fiber to transfer data
over a short distance (up to 100m), while the SFP28 LR is mainly used with OS2
single mode fiber for long distance transmission (up to 10km) and the SFP28 ER
used with OS2 single mode fiber can realize at most 40km transmission. They can
be plugged into data center, campus and service provider switches and routers
to provide high speed 25Gbps connectivity.

25G BiDi SFP28 Transceiver Module

The 25G SFP28 BiDi transceiver
module adopts two optical signals of different center wavelengths, 1270/1330mm
at the transmitting end and the receiving end to realize bidirectional
transmission of optical signals on one optical fiber, thus saving fiber
resources and leading the next generation of 5G communication technology. It
has versions with different transmission distance. For example, 300m coverage
25G BiDi transceivers are usually used in base station, 10km coverage ones deployed
for the long-distance and high-loss connection between Active Antenna Unit
(AAU) and access unit.

25G WDM SFP28 Transceiver Module

25G WDM SFP28 transceiver
consists of 25G CWDM SFP28 transceiver, 25G DWDM SFP28 transceiver and 25G LWDM
SFP28 transceiver.

25G CWDM SFP28 transceiver is a
single mode CWDM transceiver for duplex optical data communications. This
module uses single mode fiber and operates at a nominal wavelength of CWDM
(1271~1331nm). CWDM transceiver is designed for short-range communications and
is mainly used for city and access networks. Moreover, 25G CWDM SFP28 solution
can well solve the current 5G millimeter wave pre-transmission problem.

25G DWDM SFP28 transceiver,
currently seen on the market, can convey the signal to 10km on single mode
fiber, designed for long-haul transmission where wavelengths are packed tightly
together in order to increase bandwidth over existing fiber networks.

25G SFP28 LWDM transceiver
presents as a low-cost solution among 25G WDM transceivers, for it adopts relatively
cheap DML lasers to keep a stable transmission, making it an ideal and
efficient solution in 5G front-haul transmission. The module can also save
fiber resources by achieving the multi-channel signals transmission on one
single fiber. By applying SFP28 25G LWDM transceiver to wavelengths with low
dispersion, the transmission distance can be extended to 40km.

25GbE transceiver is a critical
carrier to implement 25G Ethernet technology in cloud and enterprise data
center environments. As the enhanced version of SFP+, 25G SFP28 transceiver is
able to handle 25Gbps per lane transceiver while ensuring backward
compatibility to SFP and SFP+.