Hi Mohamed,
the spectrum was just an example.
Thank you a lot. Your answer of your first point helped me a lot.
By the way, Optisystem provides the cross section file of the ytterbium doped fiber beginning from about 850nm to 1200nm. What I need is a cross section file (absorption and emission spectra) before 850nm in the range between 400nm and 800nm. Is it possible to receive this cross section file?
Please answer me as soon as possible.
Best regards,
Ebraheem