Fiber Optic Telecommunication phần 3 pptx

F IBER O PTIC T ELECOMMUNICATION

© 2000 University of Connecticut 313

Figure 8-14 Effects of system rise time for RZ format and NRZ format:

a) Transmitted RZ pulse train

b) Received RZ signal with allowable tr.

c) Transmitted NRZ pulse train

d) Received NRZ pulse train with allowable tr

X. MULTIPLEXING

The purpose of multiplexing is to share the bandwidth of a single transmission channel among

several users. Two multiplexing methods are commonly used in fiber optics:

1. Time-division multiplexing (TDM)

2. Wavelength-division multiplexing (WDM)