Hi Shaymaa,
there is component named SOA, that can be used.
CW Laser diode could be used for your block High-Speed LD”.
for EOM, there are different modulators that could be used like “AM”, “Mach-Zehnder Modulator”, “Burst Modulator” and other modulators. you can use one of them based on the required output of the block diagram.
For the digital delay generator, there are three delay components “Binary Delay”, “Optical Delay”, and “Electrical Delay”. you can uses one of them based on your design. I mean, based on the type of the signal that you will delay you can use the suitable one of them.
For the Pattern generator, you can either use “User Defined Bit Sequence Generator” if you want to generate specific pattern or use “Pseudo-Random Bit Sequence Generator” for random bits generation.
So all blocks exist in OptiSystem to be used to build your system.
Hope that helps.
let us know if you have any other comments.
best of luck.
Mohamed Abouseif