Dear Vamsi,
this is relatively a clean eye. You need to check the parameters of your setup to get similar eyes. Please check the example (Lesson 4 Parameter Sweeps – BER x Input power.osd) in OptiSystem Example Library as it demonstrates the effect of the system parameters on the measured eye diagram. The example is located at the following link.
C:UsersUSER NAMEDocumentsOptiSystem 19.0 SamplesIntroductory tutorials
regards,
Ahmad