The NRZ transmitter module consists of InP Mach Zehnder Modulator and conventional Distributed Feed-Back (DFB) laser. PAM4 vs NRZ, are the two most commonly used modulation technologies, each with its own advantages and applications. This article will delve into the differences between these two technologies, and their respective application scenarios, and guide how to choose the most suitable 50G optical module. What does it mean? This allows us to encode 3 bits in the same time it would take a Direct Connection to encode one. Unclear if future CMOS nodes will support baud rates beyond 50Gbd 2. PAM-4 acceptable for long links, but NRZ modulation preferred for short, latency sensitive links At 50Gb/s channel speed, Wavelength Division Multiplexing is essential for module scaling Wafer-scale 3-D packaging and assembly. O-band, C-band, 1310 nm & 1550 nm The ModBox-850nm-NRZ series is a family of Reference Transmitters that generate excellent quality NRZ optical data streams up to 28 Gb/s, 44 Gb/s, 50 Gb/s at 850 nm. The TQ2025-TUNC-SO is a pluggable QSFP28 DWDM transceiver designed for high capacity 100 Gigabit Ethernet (100GbE) Data Center Interconnect (DCI) optical communication applications up to 80km unamplified or 300km amplified over a singlemode fiber.