OSFP 400G Eoptolink's EOLO-134HG-5H-MXX OSFP DR4, 4x100G Optical transceiver module are designed for use in 400 Gigabit links over 500m singlemode fiber. They are operating on 1310nm wavelength, and are compliant with the OSFP MSA. This article introduces the fundamental concept and key characteristics of 400G OSFP Ethernet optical transceivers, and analyzes their practical value in data center and high-speed networking scenarios, with reference to NADDOD's 400G OSFP product portfolio. The optical signals back into electrical signals. It converts electrical signals into optical signals and vice versa, enabling data transmission over optical fibers. Capable of transmitting 400 Gbps over 120 km, Lumentum OSFP 400ZR coherent. Designed for high thermal capacity, electrical scalability, and forward compatibility, OSFP modules now drive connectivity across 400G, 800G and the emerging 1. The following analysis dives into the technology behind OSFP optics, performance evolution across speed classes, deployment. Eoptolink is producing full range of OSFP (Octal Small Form Factor Pluggable) a new pluggable form factor with eight high speed electrical lanes that will initially support 400 Gbps (8x50G or 4x100G). It is slightly wider and deeper than the QSFP-DD but it still supports 32 OSFP ports per 1U front.