Optical transceivers are key devices to realize optical network interconnection in the data center. As the number and density of ports go on, data centers have to take the cost of optical transceivers into consideration since it is expected to account for nearly half of the cost of optical networks in IDC. At present, the newly-built data centers of major Internet companies are looking to make a transition to 400G Ethernet. 400G QSFP-DD optical transceivers are the most common optical solutions for the 400G high data rate network connectivity. A brief introduction of 400G QSFP-DD optics will be given in this post.
Comparison of 400G QSFP-DD Transceivers
Comparison of 400G QSFP-DD Transceivers
Common 400G Transceiver Types in the Market
400G DR4
FLS400C005S
400G DR4 is an optical transceiver module designed for 400G Ethernet data center interconnect in QSFP-DD (Quad Small Form Factor Pluggable-double density ) form factor. On the transmitter end, this DR4 module converts 8 channels of 50Gb/s (PAM4) electrical signal into 4 channels of parallel optical output data, each capable of 100Gb/s data rate for an aggregated bandwidth of 400Gbls. On the receiver side, the optic transceiver converts 4 lanes of parallel optical data of 100Gbp/s each lane for an aggregated of 400Gbp/s to support 8 lanes of 50Gb/s PAM4 electrical output signal.
Parameters of FLS400C005S QSFP-DD 400G DR8
400G FR4
FLS400C020S
The 400GBASE-FR4 module is a 400Gbps hot-pluggable transceiver in a QSFP-DD form factor that supports 8 high-speed electrical interfaces connecting to the host. The 400G FR4 transceiver incorporates 4 independent lanes on CWDM4 center wavelengths of 1271/1291/1311/1331nm running at 100Gbps per lane. 4 uncooled 100 Gbps CWDM EMLs are used in the DSP AND EML lasers as an optical drive with an optical multiplexer. It is designed with a duplex LC connector for the optical interface to support up to 2km transmission for 400G Ethernet links over single-mode fiber (SMF). 400G FR4 QSFP DD fiber transceiver module follows a similar protocol of 100G Single Lambda MSA specification for 400G FR4 and QSFP-DD MSA specification.
Parameters of FLS400C020S QSFP-DD 400G FR8
400G LR4
400GBase LR4 fiber optic modules are designed with a built-in Gearbox chip that multiplex the two channels’ electrical input data into single-channel outputs signal and then modulates it to the optical receiver end. Specifically, the DSP basis gearbox converts 8 channels of 25GBaud PAM4 signals into 4 channels of 50GBaud (PAM4) signals over an SMF (Singlemode Fiber) cable with duplex LC connectors. This 400G LR4 transceiver product features FEC and full real-time digital diagnostic monitoring, supporting a transmission distance of up to 10km. It defines a 400Gb/s PHY for operation on the four CWDM center wavelengths of 1271, 1291, 1311, and 1331nm. FiberMall’s 400G LR4 transceiver has the same function and quality as the Cisco 400G transceiver and Arista 400G transceiver and has better compatibility.
400G SR8
FLS400C010S
400G SR8 is a Quad Small Form Factor Pluggable–double density fiber optic transceiver compliant to IEEE 802.3bs Specification. This module offers 8 parallel transmitter and receiver lanes, where 400 Gigabit Ethernet signal is carried over. Each of these 8 independent channels is capable of a 53.125Gbps(PAM4) data rate to aggregate a total bandwidth of 400Gb/s on 100 meters of OM3 multi-mode fiber cable with MTP/MPO-16 connector. The center wavelength of the 8 independent channels is 850nm. Similar to DR4, FR4, LR4 QSFP-DD 400G optical module, 400G SR8 is compliant with QSFP-DD MSA specification and IEEE 802.3bs protocol.
Parameters of FLS400C010S QSFP-DD 400G SR8
About Etern
Etern Optoelectronics, as a professional transceiver manufacturer, can provide a series of 400G transceivers as well as high quality transceiver solutions.
For more information, visit Etern Optoelectronics website: https://www.szetern.com, or email to: sales@szetern.com