Tag Archives 400G

We at VIAVI have long been aware of the impact of latency on the datacoms and telecoms ecosystem.  Specialized applications have been developed which allow customers to develop and evaluate ICs, optical modules, ASICs and systems based on their bandwidth throughput and latency. Historically, people have focused on microseconds, but increasingly – especially driven by […]

Modern high-speed links for the fastest Ethernet rates of 400GbE and above use PAM-4 electrical modulation. This modulation format allows interfaces to run at the speeds required for 400GbE and above, but PAM-4 modulation is more susceptible to the impacts of noise and signal integrity.  This is mitigated by the use of forward error correction […]

While evaluating high-speed network test equipment, it may be tempting to forgo deep physical layer testing capabilities to save money and reduce testing complexities. In some cases, these ‘just good enough’ solutions appear to fit the bill, but lack of deep insights can lead to product re-designs, longer development cycles or systemic failures in the […]

Since the emergence of 400 Gigabit Ethernet (GbE) around 5 years ago, we have seen PAM-4 modulation replace NRZ on both optical and electrical interfaces. We now see a broad and healthy ecosystem building for 400 GbE, and even 800 GbE, using PAM-4 signaling.  In fact, we are even seeing the first 100 Gb per […]

Pluggable coherent optics really hit mainstream in 2022 and a big part of that was the multi-vendor ZR interop at the OIF booth at OFC 2022. It was great to be involved in this public event as we have been involved in the background for many years supporting the pluggable coherent ecosystem from the earliest […]

Transformative technologies such as edge computing, 5G, and mobile clouds are enabling bold and exciting new business models. Industry 4.0, autonomous vehicles, and remote medicine are just a few examples of the advances these technologies offer. Open RAN (O-RAN) is a key foundational framework poised to facilitate this revolution, allowing for rapid and widespread innovation […]

While you are walking the OFC 2023 trade show floor in San Diego, you may notice VIAVI ONT-800 setups in various booths, helping manufacturers demonstrate the performance of their products to their own customers. One manufacturer using VIAVI gear is InnoLight Technology Ltd., a global manufacturer of high-speed optical transceivers in booth #4115. New InnoLight  […]

One of the most significant areas we have seen driving new test and measurement requirements has been data center interconnect – DCI. This rapidly growing area leverages the emergence of pluggable coherent optics (DCO) to allow rapid scaling of data center interconnect bandwidth based on an open, multi-vendor ecosystem. For the DCI market to grow […]

Pluggable optical modules are a huge success factor in modern networking equipment. An end user can buy a network element, such as a router or switch, and provision ports in a pay-as-you-grow manner. They can plug optical modules into the ports and chose the reach (from a few meters with DAC copper through to 100’s […]

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