Hello everyone,
I am master degree student and I am new to this software and I am doing my mini project. Can anyone help me in designing a PAM4 modulation. I have designed PAM4 modulation with directly modulated laser and with external modulated laser ( with mz modulator and cw laser). I have given 10Gbps as input and also by varying the fiber length in optisystem 21.0.0 evaluation setup.
In external modulated laser ( i.e with mz modulator and cw laser), I am getting the PAM4 signal correctly after the fiber but in the receiver side the quality factor is 0 and BER is 1. Its the same even after changing the fiber length.
In directly modulated laser, I am getting the PAM4 signal different from the PAM modulated and after the directly modulated laser ( i.e. the signal is different in both the oscilloscope and optical time domain visualizer) and in the receiver side the quality factor is 0 and BER is 1. Its the same even after changing the fiber length.
I don’t have any idea where it went wrong. Kindly please help me in this design.
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