With the explosion of 5G, cloud computing, and AI computing power, the demand for bandwidth in data centers and communication networks is growing exponentially. However, problems such as limited fiber resources, high wiring costs, and tight rack space have become "invisible bottlenecks" that restrict network upgrades.

What is ETU-LINK 100G QSFP28 BIDI Optical Module?

Adopting single-fiber bidirectional transmission ( WDM ) technology, only one fiber is needed to complete bidirectional data transmission, saving 50% of fiber resources; high-density design, using small-size QSFP28 packaging, adapting to high-density switch ports; strong compatibility, supporting interconnection with mainstream brand switches, and smoothly upgrading existing networks; supporting 100m ~ 80km transmission distance, suitable for data centers and telecom operators and other scenarios.

Key Technology

Wavelength Division Multiplexing (WDM): Traditional optical modules require two optical fibers to be responsible for "transmission" and "reception" respectively, while the BIDI module uses wavelength division multiplexing (WDM) technology to allow a single optical fiber to carry two optical signals of different wavelengths at the same time, such as an upstream wavelength of 1270nm and a downstream wavelength of 1330nm. The two wavelengths do not interfere with each other, just like dividing a "two-way lane" on a road, achieving efficient coexistence.

PAM4 Modulation: Traditional NRZ modulation technology (0/1 two levels) faces bandwidth bottlenecks at high rates, while PAM4 (four-level pulse amplitude modulation) improves efficiency through "four lanes in parallel"; each symbol carries 2 bits of information, doubling the rate compared to NRZ; compatible with 50Gbps single wavelength, easily achieving 100G total bandwidth.

Advantages of 100G QSFP28 BIDI Optical Module

Take ETU-LINK 100G BIDI 40km ER1 Optical Module as an example

• Lane signaling rate 106.25Gb/s with PAM4
• Support KP4 FEC inside the module
• Up to 40km transmission on SMF
• EML Laser and APD receiver
• 4x25.78Gb/s with NRZ electrical interface (CAUI-4)
• QSFP28 MSA package with simplex LC connector
• Power consumption <4W

Summary: Efficient networking starts with “reduction”

ETU-LINK 100G QSFP28 BIDI optical module redefines the cost-effective 100G transmission solution. Whether it is data center expansion, 5G construction, or enterprise network upgrade, it can help users reduce resource investment, simplify operation and maintenance processes, aiming at future evolution, it reserves smooth transition space for 200G/400G upgrades.

In data centers, it can meet the needs of high-speed networks for applications such as big data transmission and cloud computing; in telecommunications networks, it can be used to build long-distance, high-speed, and stable communication links, providing powerful data transmission support for 4G/5G base stations, the Internet of Things, etc.