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Optix OSN9800 200G/400G线路侧光模块是超100G传输系统的核心部件，线路码型决定了系统容量、传输能力。The line code types supported by 200G are 200G ePDM-16QAM, 200G ePDM-8QAM, and 200G ePDM-QPSK. 400G supports dual-carrier in addition to the 400G ePDM-16QAM line code type. This section introduces the 400G line code type as an example.
- 1. 2x200G ePDM-16QAM line code type
Compared to 100G ePDM-QPSK, the advantage is that the system
Compared to 100G ePDM-QPSK, the advantage is that the system capacity is doubled, but the transmission distance is shorter than that of 100G ePDM-QPSK, which is suitable for large-capacity transmission in the metropolitan area.
- 2. 2x200G ePDM-8QAM line code type
The system capacity is smaller than 2x200G ePDM-16QAM, but the transmission distance is longer than 2x200G ePDM-16QAM, which is suitable for medium and long distance transmission.
- 3. 2x200G ePDM-QPSK line code type
This is the strongest 400G code type technology, but the system capacity increase is small, and is suitable for long distance transmission.
- 4. 400G ePDM-16QAM line pattern
Compared to 200G ePDM-16QAM, the transmission distance is shorter, and this pattern is suitable for high-capacity transmission in metro area.
The above code type technology, compared to 100G ePDM-QPSK, will have a significant increase in system capacity, bit cost, power consumption, etc., which is the key value of using 400G transmission.
