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