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400G QSFP-DD DR4 Optical Module and Connectivity Solution
Knowledge Base + 2023.11.30

With the increased demand for faster and more reliable networks, 400G has become one of the most popular optical modules when interconnecting next-generation data center networks.QSFP-DD is the 400G solution needed for next-generation cloud computing networks. To facilitate better network deployment, Walsun will introduce a 400G QSFP-DD DR4 optical module for short-haul single-mode applications.

Product Characteristics

400G QSFP-DD DR4 is a 4-channel full-duplex transceiver module in a hot-swappable QSFP-DD package, with a rate of up to 425Gbps, compliant with the QSFP-DD MSA and the IEEE 802.3bs 400GBASE-LR8 Ethernet standard, and adopts the MPO interface, with an operating wavelength of 1310nm, a maximum power consumption of 12W, and is RoHS compliant. RoHS compliant.

Connectivity Solutions

400G QSFP-DR4 optical module adopts 1310nm EML transmitter type, the signal is modulated by PAM4 pulse amplitude modulation, and the transmission distance is up to 500m through single-mode fiber, which is suitable for short-distance 400G and 200G/100G optical interconnection. The following are two connection options for 400G QSFP DR4 optical modules:

1, can be connected to the opposite end 100G QSFP28 DR optical module through MPO-12 to 4*LC duplex branch fiber optic patch cord.


2. 400G QSFP-DD DR4 optical modules can be connected to both ends in the server room via MPO/MTP-8 single-mode fiber patch cords to achieve 400G transmission.


At the same time, silicon optical chip technology has matured and developed. 400G QSFP-DD DR4 silicon optical module adopts silicon optical chip to realize ultra-large-capacity data exchange while effectively controlling cost and power consumption. With the continuous development of 400G large-scale data centers, the demand for 400G QSFP-DD DR4 optical modules is increasing.


1、What is 400G QSFP-DD optical module?

A:400G optical module refers to the optical module products whose transmission rate reaches 400Gbps. Currently the mainstream packaging type is QSFP-DD and OSFP, QSFP-DD is a high-speed optical module interface specification, the upgraded version of the QSFP interface, support for 400G high-speed transmission. Using optical fiber as the signal transmission medium, by converting electrical signals into optical signals and transmitting them in the optical fiber.

2、What are the common types of 400G QSFP-DD optical modules in the market?

A: The common 400G QSFP-DD optical modules in the market have the following types in the market: QSFP-DD SR8, QSFP-DD DR4, QSFP-DD FR4, QSFP-DD FR8, QSFP-DD LR4, QSFP-DD LR8 and QSFP-DD ER8 optical modules.

3、What is the difference between QSFP-DD and OSFP optical modules?

A: QSFP-DD is smaller in size and more suitable for data center applications, which is the mainstream development direction, while OSFP is slightly larger in package size and consumes more power, which is more suitable for telecom applications. In contrast, the QSFP-DD interface provides four-channel small size and double the port density, OSFP for eight high-speed electrical channels, the current point of view of the QSFP-DD good compatibility and perfect support for 400G is still the preferred choice of the market.

4、What is the transmission distance of 400G QSFP-DD optical module?

A: The transmission distance of 400G QSFP-DD module depends on the type of fiber used and the specifications of the module. Generally speaking, it can support a transmission distance of 100m-40km.

5、What are the application scenarios of Walsun 400G QSFP-DD optical modules?

A: 400G QSFP-DD optical modules are usually used in high-bandwidth requirement scenarios such as internal connection in data centers, interconnection of data centers, and connection between network devices.