100G ER4 Explained: Why Four Optical Wavelengths Still Matter
A 100G optical link does not necessarily mean one optical signal carrying 100 Gb/s. The 100G ER4 architecture takes a different approach: it divides the total bandwidth across four optical wavelengths, with each lane carrying approximately 25 Gb/s. These four channels are then multiplexed onto a single pair of single-mode fibers. This design became a … Read more