The clock recovery device provides the timing signal for the optical gate. In
Sections 6.3, 6.4, and 6.5 we discuss the OTDM transmitter, the OTDM receiver,
and the fiber transmission line in more detail.
Laboratory systems are frequently simplified as follows (Figure 6.1, lower
part): on the transmitter side, only one modulator is used and combined with the
pulse source for a 40 Gb/s optical transmitter. The generated optical data signal is
then multiplexed by a fiber delay line multiplexer (MUX) to a 160 Gb/s data signal
using either SP or AP mul tiplexing. On the receiver side, the DEMUX selects only
one 40 Gb/s TDM channel, which is detected by one 40 Gb/s optoelectronic
receiver at a given time. In a proper exper iment all TDM channels are measur ...