Definition of QSFPDD Active Optical Cable
QSFPDD Active Optical Cable (AOC) is a fiber optic connectivity solution using QSFP-DD (Quad Small Form-factor Pluggable Double Density) packaging technology. The QSFP-DD is a high-speed transceiver package that is similar to the current QSFP package but with the addition of a row of contacts to provide an 8-channel electrical interface.
Features of the QSFPDD Package
High Density
With an 8-channel electrical interface, a single cable is capable of supporting higher transmission rates and larger bandwidths.
Pluggable
Hot-swappable for plug-and-play.
Low power consumption
Using advanced semiconductor technology and circuit design, QSFP-DD active optical cables deliver high performance while maintaining low power consumption.
400 QSFPDD to QSFPDD AOC and 800G QSFPDD to QSFPDD AOC
According to the different application requirements and transmission distance, QSFP-DD active optical cable can be divided into QSFP-DD AOC (direct connection type) and QSFP-DD to 2x200G QSFP56 AOC (conversion connection type). In the following article, we will introduce you to two active fiber optic cables with direct connectivity, 400 QSFP-DD to QFP-DD AOC and 800G QSFP-DD to QSFP-DD AOC.
400 QSFP-DD to QFP-DD AOC
Features
- Data rate up to 425Gb/s (8x PAM4 53Gb/s)
- 850nm VCSEL laser and PIN receiver
- High speed I/O electrical interface (400GAUI-8)
- Single +3.3V power supply
- Hot-pluggable QSFP-DD form factor
- Operating case temperature:0~+70°C
- Compliant to RoHS-10
- Meet IEEE 802.3bs, IEEE 802.3cm, QSFP-DD MSA Rev5.0 and CMIS4.0 standards
Applications
Data Center Intra-Rack Interconnection: 400G QSFP-DD AOC is suitable for short-distance, high-speed interconnects between rack-to-rack and server-to-server within data centers.
High-performance computing environment: In a high-performance computing environment, the 400G QSFP-DD AOC can be used to connect compute nodes to storage systems.
800G QSFP-DD to QSFP-DD AOC
Features
- Data rate up to 850Gbp/s(8x PAM4 106.25Gb/s)
- Hot-pluggable QSFP-DD form factor
- Operating case temperature:0~+70°C
- Compliant to RoHS-10
- Meet IEEE 802.3u, SFF-8472, SFP MSA, CPRI, and eCPRI standards
Applications
Data center: 800G QSFP-DD to QSFP-DD AOC can be used to connect servers, storage, and network equipment within the data center.
High-performance computing: This fiber optic cable connects compute nodes and storage nodes in high-performance computing to enable data exchange and sharing.
Cloud computing: supports high-speed data transmission within the cloud computing platform.
Summary
QSFP-DD packaging technology not only lays the foundation for the development of future optical transceivers but also has backward compatibility. The QSFP-DD package is compatible with QSFP+/QSFP28 packages, which helps to reduce costs and promote its adoption in the optical module market. With the continuous progress of technology and the continuous development of the market, QSFP-DD packaging technology is expected to continue to lead the development trend of high-speed optical transceiver technology in the future.
