Jitter is defined as "the deviation between a timing event of a signal and its ideal position". When the clock signal is interfered with by modulation and crosstalk, its stability is directly affected, so the performance evaluation of clock signal has become an important research content in the field of communication. 1.Modeling tasksThis example demonstrates the setup of the Electrical Jitter component, which requires both an electrical signal and a clock signal from the PRBS in order to estimate the signal bit rate. Parametric sweeps are used to generate multi-eye diagrams with different values of jitter amplitude and frequency. 2.System settingsThe layout and its global parameters are shown in Figures 1 and 2. 
Figure 1Optical path layout
Figure 2Global Parameter Settings: Below we set the "Electrojitter" component. Jitter is divided into two categories: random jitter and definite jitter. The definition of jitter in OptiSystem is as follows:
where a is the deterministic jitter amplitude, b is the signal bit rate, and f is the jitter frequency. The parameter tr is a random jitter whose mean and standard deviation are zero Gaussian probability distributions defined by the parameter random jitter amplitude (rms value). In this case, the electrojitter parameter settings are shown in Figure 3
Figure 3The electric jitter device uses a parametric sweep type to set the jitter frequency and jitter amplitude, and the number of sweep iterations is 9 times, as shown in Figure 4 and Figure 5
Figure 4Jitter frequency parameter sweep settings
Figure 5Jitter amplitude parameter sweep settings3.Run the resultsClick Run, and get the following result:
Figure 6Eye diagram
Figure 7Time-domain histogram.