Thanks for that Damian,
Yes, I found in the Advanced Modulation folder the Coherent Optical OFDM, where I could see the coherence detection block with a heterodyne receiver with balanced output. It is really close to what I want for the beginning. Also, give an idea of how to create the waveform views after the simulation.
Is there anyway to download that sample circuit and work with it from somewhere in the website?
IS there any block in the library that simulates the ASE noise source? Or I have to use the the EDFA amplifier to get the noise from?
Regards,