This 400GBASE-DR4 silicon photonic module can achieve a transmission distance of up to 500m on single-mode fiber through MPO-12/APC connector. The optical module complies with IEEE Std 802. 3bs protocol, QSFP-DD MSA standard, CMIS interface and 400GAUI-8 standard. An Optical Transceiver is a critical optoelectronic component that facilitates seamless electro-optical (E-O) and photo-electric (O-E) conversion within fiber-optic networks. Click to get your 40G QSFP+ transceiver modules from nearby warehouses. Trusted by 260K+. Depending on transmission rates, optical modules are classified into 400G, 100G, 40G, 25G, 10G, 1G, and 100M optical modules. Compare speeds, lane structure, and choose the right module. QSFP-DD explained for engineers. Compare electrical lanes, speed, power, compatibility, and deployment scenarios to select the right 100G or 400G. 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 signals to light (and back again) so traffic can travel over fibre. The most common 400G form factor is QSFP‑DD (Quad Small Form‑Factor. The Ultimate Guide to 400G QSFP-DD Optical Modules: Key FAQs Answered In recent months, we have received numerous inquiries from users seeking information about 400G optical modules.