400G optical transceiver is an advanced product in the field of high-speed transmission, widely used in high-performance data centers, communication networks, large-scale computing, cloud computing, and other fields. We will provide a detailed introduction to 400G optical transceiver products in this article.
What is a 400G optical transceiver?
400G optical transceiver refers to an optical module product with a transmission rate of 400Gbps. The current mainstream packaging type is QSFP-DD (Quad Small Form actor Pluggable Double Density), which is a high-speed optical transceiver interface specification. The upgraded version of QSFP interface supports 400G high-speed transmission. Using optical fiber as the signal transmission medium, digital signals are converted into optical signals and transmitted in the optical fiber.
400G optical transceiver technology
The technology of 400G optical transceivers mainly includes PAM4 modulation technology, COB packaging technology, DSP digital signal processing technology, microwave integrated circuit technology, high-speed electrical interface technology, etc.
PAM4 modulation technology is the core technology for achieving high-speed transmission in 400G optical transceivers. It adopts a 4-stage pulse amplitude modulation method, which extends the traditional binary digital signal modulation to 4-stage, achieving a transmission rate of 400G.
COB packaging technology is a new type of packaging technology that uses chips to be directly soldered onto the substrate without the need for a packaging shell, enabling higher signal transmission rates and smaller volumes.
DSP digital signal processing technology is a technology used in 400G optical transceivers to achieve signal processing and decoding. It can modulate, demodulate, and correct errors in optical signals, thereby improving the transmission rate and signal quality of the optical transceiver.
Microwave integrated circuit technology is a high-frequency circuit design technology that can integrate multiple circuits onto a single chip, achieving high-speed, low-power, and small-scale high-frequency circuit design.
High speed electrical interface technology is a technology that connects 400G optical transceivers to external devices. It includes various types of interfaces, such as QSFP-DD, OSFP, etc., to achieve connections and data transmission between different devices.
Product Model Classification of 400G Optical Transceivers
According to different specifications and interface types, the product model classification of 400G optical transceivers mainly includes SR8, DR4, FR4, LR4, LR8, and ER4.
Among them, SR8 is suitable for short distance data transmission, DR4 is suitable for medium distance data transmission, FR4 is suitable for long distance data transmission, LR4 is suitable for ultra long distance data transmission, LR8 is suitable for longer distance data transmission, and ER4 is suitable for extremely long distance data transmission.
The above are common 400G optical transceiver product models in the current market, and with the continuous development of technology, more new models may emerge in the future.
Application of 400G Optical Transceiver:
The 400G optical module is suitable for broadband access, broadband networks, data center interconnection, cloud computing and other fields of operators. In terms of data centers, with the development of cloud computing and big data technology, the requirements for scalability, reliability, and low latency of data centers are becoming increasingly high. 400G optical modules can meet these requirements. In addition, the 400G optical module is also suitable for scenarios such as high-speed transmission and long-distance transmission.
The Future Development Direction of 400G Optical Transceivers:
With the increasing demand from data centers, enterprise networks, and telecommunications operators, the 400G optical transceiver market will continue to grow. With the continuous progress of technology, the cost of 400G optical transceivers will continue to decrease, and the performance will also continue to improve. In the future, the application scenarios of 400G optical transceivers will be further expanded, including fields such as the Internet of Things and 5G.
