[Selvendran SParticipant]

thanks damian, how can i calculate delt B and DGD from my designed profile … pls give me the mathematical supports for calculate it.

[Selvendran SParticipant]

thankyou ravil… actually what i am asking is if i send gaussian pulse with low input power(to avoid nonlinear) in zero dispersion region, it can also transfer to the long distance. Because it doesn’t face any dispersion or nonlinear over fiber.. is it possible to transfer the soliton over the Normal single mode fiber instead of DSF fiber?. is it possible to transfer the soliton over 30000km?

[Selvendran SParticipant]

dear damian, still i am having confusion to assign the parameter in SOA…. can u please clarify how can i calculate the saturation energy, saturation gain, amplification factor. can u please directly relate the above parameter from following link.

SOA Gain Saturation – Gaussian Pulses

[Selvendran SParticipant]

hi salwa,
i) for your first question check it out the following link to get the answer
http://en.wikipedia.org/wiki/Laser_linewidth
ii) PIN diode is sufficient for optical reception. if u need further amplification at detector it self mean go for APD. APD is optional one for your different requirements

[Selvendran SParticipant]

No, Chirp-Managed Directly Modulated Laser (CML) is a special kind source to mitigates the dispersion in a fiber for long reach PON network.
CML is nothing but combutination of (DML Laser + Passive Optical Filter)…
As per Reply #12575 the problem is raised from the phase noise or chrip of DML laser mean, CML can be a better alternate to rectify your problem.

herewith i have attached some journal papers regarding Chirp-Managed Directly Modulated Laser for your reference… all the best for your research..

Attachments:

1. CML-laser.rar

[Selvendran SParticipant]

In bidirectional fiber both forward and backward signal propagation should have to meet at same time ( as like real time) but in simulation it is not possible due to some operation being on either direction . in order to meet system as like real time here we introduce delay ,which will hold the signal propagation in fiber up to the completion of any operation on both side and make the signals meet the fiber at same time. the delay time is assigned it self by finding the processing time of number of component with in the operation.

[Selvendran SParticipant]

if you are using iteration in our layout( for example laser feedback loop) mean you can select the particular iteration result through this buffer selector

[Selvendran SParticipant]

try to implement the CML concept, it may helpful to u to controlled the phase related noise … but i don’t know exactly

[Selvendran SParticipant]

yes, default output is NRZ. but it can be modify to RZ(33%) or CSRZ (67%) using pulse carving technique as given in sample files of optisystem