[adnan sabbarParticipant]

Hi, You can change the parameters of the SSMF in optisystem to be HNLF,
change the effective area of the fiber from the default value (80 squared micron) for another value, for example, make it 10 squared micron to get nonlinear parameter equal about 10 w^-1.km^-1. according to the following formula

nonlinear parameter = (2*pi*n2)/(zero dispersion wavelength*effective area)
good luck

[adnan sabbarParticipant]

Thank you Marc,
I see this phrase during calculation of Bidirectional optical fiber which is back word back pumped (Raman pump). so, what parameter I have to change please?

[adnan sabbarParticipant]

attach your file if your problem is not solved yet, i will try to help u

[adnan sabbarParticipant]

Hello Mercy Leethiyal
What technique do you use in your design? For example, If u use FWM, you should mix the pump(s) with the signal in the nonlinear medium to satisfy the nonlinear interaction between the pump(s) and the signal to produce the required idler.
Good luck
Adnan

[adnan sabbarParticipant]

I think you can not use BER analyzer with any digital modulation format. try to use BER test set. and draw the constellation diagram.

[adnan sabbarParticipant]

Hello Mohammed
Try to start with a symbol examples that provided with the software package. start with the examples at the folder “Lightwave systems”
Good luck

[adnan sabbarParticipant]

Try to attach the osd file again, I can’t see it.

[adnan sabbarParticipant]

Hello Omar
Try to use a symbol examples that provided with optisystem package

[adnan sabbarParticipant]

Hi Ali
I explained it to you already, however, By conjugation the transmitted signal, The chromatic dispersion and Kerr effects will be cancelled through the second part of the fiber. see attached equations.
Regards

Attachments:

1. 

   OPC.jpg
   

[adnan sabbarParticipant]

Hi
There is no attached file. please check

[adnan sabbarParticipant]

sorry, you can find the file below

[adnan sabbarParticipant]

the file

[adnan sabbarParticipant]

Hello friend, for CD compensation I can help you. But I couldn’t understand the second part of your question.
However, there are two methods to mitigate the chromatic dispersion.
1- using Dispersion Compensation Fiber (DCF)
2- Optical Phase Conjugate (OPC)

[adnan sabbarParticipant]

Kindly attach your optisystem file to solve your problem

[adnan sabbarParticipant]

sorry, this is the attached file that I mentioned it above.

Attachments:

1. OFDM-Coherent-Detection-Single-Port-Single-Polarization-QPSK.osd