Buy 100G and 400G fiber optic transceivers for high-speed, high-density and high-capacity data center solutions at QSFPTEK online store. Compatibility guaranteed and same-day shipping. The 400G QSFP-DD ZR+ Pro is a C-Band optical frequency tunable coherent optical module,combines 7nm coherent DSP ASIC functionality with best in class ultra-narrow line-width tunable lasers, high-speed modulators and high responsively coherent receivers to deliver high performance at 100G DP-QPSK/. The Cisco 400G QSFP-DD Ultra Long-Haul Coherent Optics Module enables 400G traffic anywhere over dense wavelength division multiplexing amplified networks, and is available in both C-band and L-band. Cisco has expanded the range of 400G digital coherent QSFP-DD transceivers with the 400G QSFP-DD. This guide explains 400G optical transceivers in plain English and shows how Carritech Optics helps you deploy them with confidence. What is a 400G optical transceiver? A 400G optical transceiver is a hot‑swappable module that sits in a switch, router, or NIC and converts high‑speed electrical. Qualified for use across Juniper's 400GbE-capable ACX, MX, PTX, and QFX product families, Juniper offers a broad portfolio of 400G coherent and direct-detect optical transceivers to address the growing demand for bandwidth in metro, edge, core, and data center networks. 3cn 400GBASE-2xFR4 Ethernet transmission protocol, supporting link transmission of up to 2km. By partnering with tier-1 optical component manufacturers, we ensure every module meets the highest industry standards.