i am working on optical communication project,Design of qpsk modulator using optisystem.please find the attachment below. can u please explain and give the detail working of it.its very much necessary.
Please find the attached papers. One is for QPSK modulator, the other is for coherent detection. The principles are explained very well in these two papers.
By the way, the sample you attached is in old version. If you upgrade it to the latest version OptiSystem 12.2.1, you will find a better sample with DSP in it.