In this unit, we are going to demonstrate how to set up a simple time domain simulation
in INTERCONNECT and run it to get some basic results.
We will start the simulation setup by placing a time dependent source, a continuous wave CW laser in the
In the property editor we will keep the frequency at the default
193.1 THz and the power to the default 0 dBm which corresponds to 1 mW.
Note that the output signal mode is set to "sample" since it takes the value of the output
signal mode of the "Root Element" by default.
This means that the time domain simulation will use the Sample Mode approach.
Next, we will add an amplitude modulator from the "Modulators" folder in the element library.
The amplitude modulator element modulates the amplitude
of the optical signal at the input port based on the electrical signal applied at the modulation
In the property editor, we will keep the modulation index to the default value of 1.
To provide the modulating signal, we will add a non-return to zero electrical pulse
In the property editor window, keep the bias and amplitude to the default values .
The modulation signal for the pulse generator will come from a pseudo random bit sequence
or PRBS generator.
Keep the bit rate at the default value of 25 Gbit/sec.
Connect the output of the CW laser to the input of the AM and the output of the pulse
generator to the modulation input of the AM.
Connect the PRBS generator to the modulation port of the pulse generator.
We will now add a straight waveguide to the circuit followed by a PIN photodiode
We'll connect the input of the Straight Waveguide to the output of the Amplitude Modulator
To keep things simple, we will keep the properties of the waveguide and photodiode at their default
Finally, we will place an eye diagram analyzer in the circuit.
We will connect it to the photodiode output and the
output of the electrical pulse generator.
The simulation is now set up.
We can run the time domain simulation by clicking on the RUN button.
Once the simulation finishes running, we can view the eye diagram from the analyzer.