Data Center AOC Active Optical Cable Solution

10-12-2019

The rapid application of the Internet and smart terminals has caused an explosive growth in the amount of global data, which has greatly promoted the development of high-performance supercomputing center (HPC) and data center markets with high-speed routers, supercomputing and storage as the core. Active optical cable products are one of the main interconnection methods between these core devices. The active optical cable market research report from CIR shows that its market size is expected to reach $ 1.9 billion in 2017, with a promising future.


With the gradual commercial application of 40G/100G port servers, switches and other devices in the data center, there is more and more demand for high-speed optical interconnection products. At present, domestic device manufacturers continue to develop and innovate optical interconnection technology, and conduct in-depth understanding and Research on high-speed integrated parallel optical modules and high-frequency signal integrity technology. The key requirements of optical interconnection products are high speed, high density, low cost and low power consumption.


QSFP+ AOC active optical cable is a highly efficient integrated cable assembly product designed for short-distance multi-channel data communication and interconnection applications. There are 4 data channels in each signal direction, and the total bandwidth of 40Gbps is achieved in a single module. Each channel can work at 10Gbps, and the communication distance is from 1 to 100 meters. It is suitable for supercomputers and SDR, DDR and QDR applications based on the InfiniBand standard. AOC active optical cable is the core component of parallel optical interconnection. It consists of a ribbon OM3 optical cable connected to two high-speed 40G parallel optical modules (with four 850nm VCSEL transmission channels and four PIN receiving channels, all at 10Gbps).

Data Center

Significant advantages and applications of high-speed optical interconnect technology


The demand for higher bandwidth and lower power consumption of data center/cloud computing systems is more and more urgent. AOC active optical cable is one of the best solutions to meet this demand. AOC active optical cables have many significant advantages over interconnected copper cables. For example, the transmission power on the system link is lower, the weight is only a quarter of the direct-connected copper cable, and the volume is slightly half that of the copper cable. The cabling system has better air flow and heat dissipation. The bending radius of the optical cable is smaller than that of the copper cable, and the transmission distance is longer (up to 100 ~ 300 meters). The bit error rate of the product transmission performance is also better. BER can reach 10 ^ -15. Compared with the optical transceiver module, the AOC active optical cable has a non-exposed optical interface, does not have the problem of cleaning and pollution of the optical interface, the system stability and reliability are greatly improved, and the maintenance cost of the equipment room is reduced.


The 40G QSFP+ AOC and 100G QSFP28 AOC interconnected by C-FLINK Data Center use highly integrated array light engine core device technology, and use COB (Chip on Board) integration technology on PCBA to achieve an integrated mode-small package, high speed Low power consumption (QSFP+ power consumption is less than 1.5W, QSFP28 power consumption is less than 2.5W). At the transmitting end, the array optical engine processes multiple high-speed electrical channels at the same time, converts them into multiple optical signals, and combines these optical signals together. The information is transmitted to the 12-core (24-core) MPO high density optical cable Cloud computing system or data center next room node. At the receiving end, the array optical engine converts the optical signals in the MPO cable back to electrical signals, and transmits multiple electrical signals to the device for processing. These products are fully suitable for infiniband interconnection application scenarios, and also comply with Ethernet IEEE 802.3ba. In the field of cloud computing systems, array optical engine technology has been widely used in active fiber optic cable products-interconnection between servers and switches.


In the data center computer room, devices (servers, switches, HBAs, etc.) that provide various high-speed optical communication ports need to be connected together by cables to work together. So how to solve the interconnection of any two devices? For example, 10G SFP+ and 40G QSFP+ devices. Active optical cable QSFP+ to 4 SFP+ AOC optical interconnection products become the best solution to achieve and solve the QSFP+ and SFP+ equipment interconnection.

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