Page 451 - Fiber Optic Communications Fund
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432 Fiber Optic Communications
Electrical field (arb. units) Red shift Blue shift
Time
Figure 10.5 Instantaneous electric field at the fiber output.
where P is the peak power and
peak
1 − exp (−L)
L eff = , (10.97)
−1
= 0.046 km , (10.98)
L = 100 km. (10.99)
L eff = 21.52 km. (10.100)
total length
No. of spans =
amp. spacing
1000 km
=
100 km
= 10. (10.101)
Total nonlinear phase shift = 10 NL . (10.102)
P peak (dBm)= 0 dBm, (10.103)
P peak (dBm)∕10
P peak = 10 mW
= 1 mW, (10.104)
10 NL < 0.5, (10.105)
3
10 × × 21.52 × 10 × 1 × 10 −3 < 0.5,
−3 −1 −1
< 2.32 × 10 W m .
