Why do we use 25G Small Form Factor Pluggable 28 LWDM Optical Transceivers in the 5G Front-Haul system?

We widely use 25 Gigabit fiber optic transceivers in the system of 5G front-haul. To protect fiber resources, we adopt 25 Gigabit WDM modules for transmission of 5G front-haul. Nevertheless, 25 Gigabit WDM optical transceivers are more costly than the other modules of  25G, such as SFP28 LR optical transceiver, SFP28 SR transceiver, 25 Gigabit SFP28 Bi-directional modules, etc. The 25 Gigabit SFP28 LWDM optical transceiver can attain mixed channel signals communication upon one single optical fiber. It is cost-effective compared with 25 Gigabit WDM optical transceivers. Because of its stability, cost-controllability, and flexibility, 25 Gigabit SFP28 LWDM optical transceivers tend to promote widely in the system of 5G front-haul.

Why do we Use 25G Small Form Factor Pluggable 28 LWDM Optical Transceivers in the System of 5G Front-Haul?

25 Gigabit SFP28 LWDM optical transceivers are entirely adaptable to the standard of IEEE 802.3ba to offer a flexible approach for 25GbE network to quickly develop to only one wavelength 100G or 50G in the time ahead. The LWDM signifies LAN WDM 25 Gigabit Small Form Factor Pluggable 28 LWDM module possesses twelve wavelengths, and they have a connection with the O band. Among these wavelengths, eight are recognized wavelengths having an 800-hertz band interval. And the 25 Gigabit LWDM optical transceiver’s four wavelengths multiplex the wavelengths of 25 Gigabit Small Form Factor Pluggable 28 CWDM optical transceivers (1291.10nm, 1313.73nm, 1332.41nm, 1269.23nm). Like all other modules of 25 Gigabit WDM,  25 Gigabit Small Form Factor Pluggable 28 LWDM optical transceiver may also use the technology of WDM to multiplex different wavelengths upon optical fiber’s pair to protect a group of fiber optic resources.

We can observe from the above figure the 25 Gigabit  LWDM module takes on wavelength channels in the range of 4 nanometers which is limited compared with 25 Gigabit Small Form Factor Pluggable 28 CWDM's, the massive wavelength shifting will come out. Generally, 25 Gigabit LWDM's working temperature ranges from 40°C to 85°C. When there is a change in temperature by 01°C, a counterbalance of around 0.1 nanometers will produce. Moreover, the Small Form Factor Pluggable 28 LWDM optical transceiver may develop a wavelength shifting of 12.5 nanometers. Temperature Control is significant for 25 Gigabit LWDM fiber optic transceivers to maintain a secure transmission. It can produce the charge carrier's movement inside the conductor. While Direct Current (DC) goes through two distinct conductor components, exotherm or heat absorption will occur upon the contact edge to maintain a safe wavelength. In such a way, the Small Form Factor Pluggable 28 LWDM fiber optic module can provide accurate and stable data transmission in conditions with demanding communication requirements.
The table below manifests some standard particulars of 25 Gigabit Small Form Factor Pluggable 28 LWDM optical transceivers.
In der nachstehenden Tabelle sind einige Standardangaben zu den optischen 25-Gigabit-Small-Form-Factor-Pluggable-28-LWDM-Transceivern aufgeführt.

Like 25 Gigabit CWDM/DWDM optical transceivers, the 25 Gigabit Small Form Factor Pluggable 28 LWDM modules also multiplex different wavelengths upon a single optical fiber. However, we implement them at a cheap budget. As SFP28 25 Gigabit CWDM optical transceiver, the receiver's design possesses a massive dispersion that requires a more costly APD receiver to secure the communication's stability. Nevertheless, the Small Form Factor Pluggable 28 LWDM module's wavelengths are at areas of low dispersion, having PIN receivers near the receiving ending to fulfill the transmission requirements. As regards lasers, if we compare them with Small Form Factor Pluggable 28 DWDM module, 25 Gigabit SFP28 CWDM optical transceivers do not need to utilize the costly EML lasers. Nevertheless, we can realize them by the comparatively low-priced DML lasers to maintain a safe transmission and secure cost for the production, making them a productive and ideal solution for the communication of 5G front-haul.

How can we Use 25 Gigabit SFP28 LWDM Optical Transceivers in the System of Network?

The link of 25 Gigabit Small Form Factor Pluggable 28 LWDM optical transceivers is the same as DWDM/CWDM modules, which we need to use with LWDM Multiplexer/De-multiplexer. You have to plug four 25 Gigabit Small Form Factor Pluggable 28 LWDM modules within two 25 Gigabit switches, respectively. After that, we use four SMF cables to link to the modules of Small Form Factor Pluggable 28 LWDM and LWDM Multiplexer/De-multiplexer, respectively. We can connect these two LWDM Multiplexers/De-multiplexers by one SMF cable. The figure below describes a direct link for 25 Gigabit Small Form Factor Pluggable 28 LWDM optical transceivers utilizing LAN-WDM Multiplexers/De-multiplexers.

Conclusion:

25 Gigabit Small Form Factor Pluggable 28 LWDM optical transceivers can favor multi-channel transmission upon a single optical fiber. It thinks up for the flaws of massive dispersion of 25 Gigabit CWDM module including high laser expenses of 25 Gigabit DWDM optical transceiver, which provides a safe transmission and secures many fiber optic resources in the communication of 5G front-haul. Therefore, it is a cost-effective and stable solution in the system of 5G front-haul. It is good in the prospective progress of the transmission of 5G front-haul.