China Telecom Research Institute recently organised the first comprehensive testing of 5G fronthaul LWDM solution. The testing objects included 25G LWDM transceivers and optical MUX-DEMUX. The evaluation covered conventional performance tests and extreme temperature tests for industrial-grade applications (-40°C to +85°C). Talking about other WDM transceivers, we also launched 25G MWDM transceivers.In the testing, ATOP 25G LWDM transceivers, combined with SDGI optical MUX-DEMUX, passed all index tests with excellent performance reports under various extreme conditions. This includes high and low extreme temperature operation (-40℃～+85℃ temperature cycle, +85℃ and 85% humidity storage, -40℃ storage).Additionally, after pairing with the network, the transceivers did not encounter any error codes within 24 hours in the 40km transmission system. This further demonstrates the transceiver’s obvious performance advantage.ATOP’s 25G LWDM transceiver adopts a standard SFP28 packaging form with DFB (with TEC)/PIN solution. The transceiver’s transmission rate can reach up to 25.78Gbps and a distance of 10 kilometres (40 kilometres maximally), while the wavelength can support 12 channels (1269.23nm～1318.35nm) of O-band. Furthermore, the operating temperature range enables applications in both commercial and industrial level environments. Currently, ATOP’s 25G LWDM is in mass production. Combined with SDGI optical MUX-DEMUX, we are able to provide clients with an integrated solution that can also meet batch order demands.

MWDM

Meanwhile, ATOP has launched a 25G SFP28 MWDM 12 channel transceiver with DFB (with TEC) laser that satisfies industrial-level applications. It offers an optical power of 0-6dBm, has a transmitter sensitivity of -14dBm and maximum power consumption of 2W. A transmission distance of 10km is also supported.The transceiver combines an optical layer topping adjustment technology that implements an OAM mechanism with the capabilities of flexible deployment, fault location, and optical layer protection. It is suitable for a 5G Open-WDM/MWDM semi-active fronthaul solution, as proposed by China Mobile, and can effectively improve the efficiency of network management and maintenance. Currently, this product is available for demo purposes, and interested parties are welcome to contact us for more information.Furthermore, 5G is currently said to be the driving force behind China’s new capital construction. ATOP is determined to seize this market opportunity and to precisely identify the market vane. This will help us to undertake suitable product planning and to continuously improve the industrial chain of 5G series products.Our future efforts will also enable us to improve the R&D and productivity of 5G series products. It will lead the development of 5G fronthaul technology and accelerate the deployment of new 5G infrastructure.