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You Should Know about 400G Optical Modules

Views: 399     Author: Site Editor     Publish Time: 2025-05-08      Origin: Site

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400G optical module is also called 400G optical transceiver module. It converts electrical signals into optical signals at the transmitting end, transmits them through optical fiber, and converts optical signals into electrical signals at the receiving end. It is mainly used for the mutual conversion of electrical and optical signals in optical communication.


What are the different types of 400G optical modules?


The classification of 400G optical modules is divided into multi-mode (MM) and single-mode (SM) in terms of optical wavelength; NRZ and PAM4 modulation (currently mainly PAM4) in terms of signal modulation mode; VR, SR, DR, FR, LR in terms of transmission distance; OSFP, QSFP-DD, CDFP, CFP8, CWDM8, COBO, QSFP 112, etc. in terms of packaging form. In mainstream 400G optical modules, the optical port side mainly uses 8-way 53Gbps PAM4 (400G-SR8, FR8, LR8) and 4-way 106Gbps PAM4 (400G-DR4, FR4, LR4) to achieve 400G signal transmission; the electrical port side uses 8-way 53Gbps PAM4 electrical signals, using OSFP or QSFP-DD packaging.


Common 400G optical module types


YXFiber Item

Package

Transmission

Interface

YXF-QDD-400G-VR4

QSFP-DD

50m

MPO

YXF-QDD-400G-SR8

QSFP-DD

100m

MPO

YXF-QDD-400G-SR4

QSFP-DD

100m

MPO

YXF-QDD-400G-DR4

QSFP-DD

500m

MPO

YXF-QDD-400G-DR4+

QSFP-DD

2km

MPO

YXF-QDD-400G-FR4

QSFP-DD

2km

LC

YXF-QDD-400G-LR4

QSFP-DD

10km

LC

YXF-QDD-400G-ER4

QSFP-DD

40km

LC

YXF-Q112-400G-VR4

QSFP 112

50m

MPO

YXF-Q112-400G-SR4

QSFP 112

100m

MPO

YXF-Q112-400G-DR4

QSFP 112

100m

MPO

YXF-OSFP-400G-VR4

OSFP

50m

MPO

YXF-OSFP-400G-SR4

OSFP

100m

MPO

YXF-OSFP-400G-DR4

OSFP

500m

MPO


What scenarios are 400G optical modules suitable for?


400G optical modules, especially QSFP-DD (Quad Small Form-Factor Pluggable Double Density) standard optical modules, have become an indispensable component in data center infrastructure. Its high transmission rate and flexible connection method enable data centers to better support large-scale data transmission and computing needs while maintaining low latency and high stability. In core switches, edge switches, routers, servers and other devices in data centers, 400G optical modules are playing a vital role.


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