[shaymaa TahhanParticipant]

Should I put a value in the OFDM POWER in the OFDM modulator?

[shaymaa TahhanParticipant]

Yes SER is zero also whenever BER is zero.
1- what is the best bitrate to configure and evaluate the OFDM QAM4 system based on?
because when I increase the bitrate the BER is increasing with SMF distance (take the symbol rate half of the bitrate because I am using QAM 4)
2- if I took the one span (10km SMF, 2km DCF) should I include the length of the DCF in the OFDM demodulator or just the SMF?
if NO, then if I increase the span to 20 the DCF will be 40km is it ok to not include its length?!

[shaymaa TahhanParticipant]

whenever I got OFDM EVM less than 5% , the BER readings in the tester is 0
is that realistic or what should I do?
I have tried many times but the same!

[shaymaa TahhanParticipant]

need the answer to this question please.

[shaymaa TahhanParticipant]

please send me your email address to send you the file.

[shaymaa TahhanParticipant]

this is the signal after the RSOA

Attachments:

1. 

   after_RSOA.jpg
   

[shaymaa TahhanParticipant]

attached is my try in optisystem please correct it for me.

[shaymaa TahhanParticipant]

dear sir,
the attached block diagram , the highlighted part of SOA and Modulator.
please advice me how to connect the and please send me an optisystem picture simulate these parts
kind regrads,
Shaymaa

Attachments:

1. 

   block-diagram.jpg
   

[shaymaa TahhanParticipant]

Hello Binh,

did you mean by the BEN the same as digital delay generator shown in the following link
https://www.thinksrs.com/downloads/pdfs/manuals/DG645m.pdf
If yes did you solve your problem ??

kind regards,
Shaymaa

[shaymaa TahhanParticipant]

Dear Prof. Mohammed,
this link is the specification sheet for the digital delay generator which i am trying to simulate it
and thhttps://www.thinksrs.com/downloads/pdfs/manuals/DG645m.pdf
hopeful you can help me
Kind regards,
Shaymaa

[shaymaa TahhanParticipant]

Thank you for your prompt response. Could you please send me the example any way? I have ver 14 also.
It is very important for me.
Kind Regards
Shaymaa

[shaymaa TahhanParticipant]

Dear Sam,
Thank you for your reply. Attached the noise bandwidth of the EDFA that i meant before. thank you for clarification about logarithmic scale.

For now I am only have these two problems
1> what is the noise bandwidth that i should put in the EDFA to get the maximum Qfactor ?
2> what is the required bandwidth of demultiplexer and multiplexer to get the maximum Q factor?

again please find the attached pdf in which all the description of the simulation that I am working on.

Then i want to replace the DCF by FBG to find whether it can be more efficient with duobinary or not?

so how to calculate the length of the FBG ? how to get the Dispersion ?
for Ideal FBG i now that for a length of SMF which has (16 ps/nm km ) the dispesion will be the multiplexing of these values but in minus sign like for 100Km the FBG dispersion will be -1600ps/nm

but for FBG how?

Attachments:

1. 

   EDFA-noise-bandwidth.png