• September 18. 2025

CWDM and DWDM, the "two brothers" in fiber optic communications, differ by only one letter in their names, but the difference is huge! Today, this article will explain the core differences and help you quickly distinguish them. Ⅰ. Transmission Capacity: Worlds Apart Technically, both rely on wavelength division multiplexing (WDM) technology, but they differ significantly in key parameters. DWDM (D...

• August 14. 2025

At a time when network technology is changing rapidly, 10G networks are gradually becoming popular among the general public, and 10G optical modules, as key components for achieving high-speed optical fiber transmission, are of great importance. ETU-Link 10G SFP+ optical modules use the latest mainstream optical chip technology and packaging technology to achieve lower power consumption and lower ...

• May 19. 2025

In the wave of digital transformation, the demand for high-speed, large-capacity optical transmission in data centers, 5G bearer networks, and metropolitan area networks continues to rise. For medium- and short-distance high-density networking scenarios, the 100G QSFP28 O-Band DWDM 10km optical module launched by ETU-LINK has become a "weapon" for building efficient optical communication networks ...

• July 18. 2024

With the rapid development of information technology and the increasing demand for data transmission, optical communication technology plays a crucial role in modern networks.DWDM technology dramatically increases the capacity of data transmission by using multiple optical signals of different wavelengths on a single optical fiber at the same time. Tunable modules enable flexible and efficient wav...

• July 05. 2023

10G SFP+ optical switch has been widely used in data centers and enterprises. In this blog, ETU-LINK lists the connection schemes that accessible 10G SFP+ ports? And under what circumstances is it more appropriate to choose which one. Firstly, if the transmission distance is relatively close, we can consider using ETU 10G DAC cables for transmission. The length specifications of DACs on the market...

• April 19. 2023

In the construction of 5G network, optical module is the basic building unit of 5G network, which accounts for a large proportion of network construction cost and is the key element of 5G low cost and wide coverage. The 5G network bearer network is divided into fronthaul, midhaul, and backhaul. The fronthaul refers to the connection between the active antenna processing unit (AAU) and the distribu...

• March 18. 2023

ETU-LINK will introduce to you what is 10G SFP+ DWDM optical module and its advantages.   The traditional optical fiber communication system is transmits one optical signal in one optical fiber. This method actually only uses a part of the optical fiber bandwidth. In order to make full use of the huge bandwidth resources of the optical fiber and increase the transmission capacity of the ...

• March 04. 2023

In this blog, ETU-LINK will talk about 10G DWDM Tunable module and its differences from ordinary DWDM optical module. The wavelength of 10G conventional SFP+ DWDM optical module is fixed, while 10G SFP+ DWDM Tunable optical module can be configured to output different DWDM wavelengths. The wavelength tunable optical module has the characteristics of flexible...