Demand Modulation Format | Number of required spectrum slots | Transmission Distance (km) | ||||
10 Gbps | 40 Gbps | 100 Gbps | 400 Gpbs | 1000 Gpbs | ||
BPSK | 2 | 5 | 9 | 33 | 81 | 4000 |
QPSK | 2 | 3 | 5 | 17 | 41 | 2000 |
8-QAM | 2 | 3 | 4 | 12 | 28 | 1000 |
16-QAM | 2 | 2 | 3 | 9 | 21 | 500 |
32-QAM | 2 | 2 | 3 | 8 | 17 | 250 |
64-QAM | 2 | 2 | 3 | 7 | 15 | 125 |