Search Results for 'wdm'

[Mohammed Munir Bin-Rashed]

I am currently Designing A new submarine optical cable system
with 100G DWDM & Branching units supports OADM with wavelength reuse technology

– 19 Cable landing station CLS
– 8 fiber pairs
– more than 80 wavelength per fiber pair
– Submarine Repeaters ( Each Containing 8 EDFA pairs) with 4 pumping laser diodes per amplifier pair
– Stm 64 and stm 256 multiplexing.

Can I implement the whole network using using Optiwave Photonic Software????!

With All my respect

M.M.Bin-Rashed
ICT Engineer & Researcher

[muhammad jawadParticipant]

Dear Sir Ahmad

i have checked the simulation setup and changed the positions of the visualizers.Now both the WDM visualizers showing same values.Working OK
Regards

[muhammad jawadParticipant]

Thanks Sir AHMAD for your reply.
I got it….But the results obtained by using dual port WDM and Simple WDM analyzers are different for “OSNR”.Why?
regards
muhammad jawad

[Ahmad AtiehModerator]

Dear Muhammad,
This visualizer automatically detects, calculates and displays the optical power, noise, OSNR, Gain, noise figure, frequency and wavelength for each WDM channel at the visualizer inputs.

The Dual Port WDM Analyzer (DPWDMA) estimates the signal and the noise power for each optical signal channel based on the resolution bandwidth for each input port. Click the Analysis tab to view the results (such as gain and noise figure) comparing the signal from the two input ports (see Figure 2).

More details could be found in the component data sheet.

regards,

[muhammad jawad]

Dear all
Hope you all will be fine

please refer to a simple system attached herewith to study the noise performance of SOA(i.e i want to study the ASE noise,White noise,OSNR and Noise Figure etc).
Please let me know that both the ports of the dual WDM analyzer may be attached where in the simulation in order to measure input OSNR,output OSNR, and Noise Figure.Also specify is it better to use single port or dual port WDM analyser and what is the difference between both?
regards

[dinesh chauhanParticipant]

Hi Ranjeet ,

your TWDM file is not working in optisys 14 ,can you upload new .

[dinesh chauhanParticipant]

hello

alistu you have any file to implement wdm pon using RSOA

[Paramjot Singh]

can any body tell me how setup rof WDM system for mm waves

[dinesh chauhan]

HI guys ,can anyone let me know how can i implement “103-gb/s long reach pon implementedby using directly modulated RSOA” . please anyone help i i am not getting how can i start this paper?

[Muhammad Zuhdi]

Hi All

I am going through the WDM_PHASAR user guide and encounter a problem which is the modal field distribution cannot be displayed. I follow the instruction based on the user guide as follow:

To view the modal field distribution
Step Action
1 In the Modal Indices dialog box, click a mode from the list to select it.
2 Click the Display Field button.
The Field Display box will appear. The field distribution of the selected mode will be shown superimposed on the effective index distribution.

But in my case the field distribution is not shown. I attached the Modal Field dialog box printscreen

Thank you

Regards
Muhammad Zuhdi

[Jerrin Mohan]

Hi

I am a Master’s Degree in Engineering Student special in dissertation topic pertaining to the design of a DWDM network model. I would like to know how much will the full system cost in South African currency -Rand?

Regards
Jerrin

[muhammad jawad]

Dear friends
Hope you all are fine
please help me as i want to get a plot of transfer function(for reflection spectrum) for WDM DEMUX filter (as shown in the screen shot of the simulation setup attached).Plz comment it will be the plot between channels frequency and output power or between channel frequency and input power?
i am highly obliged for your help
regards
jawad

[muhammad jawad]

Dear colleagues
how are you all?
i have a question and needs your help.
please tell me how the chirped gaussian pulses can be used to generate UWB mono or doublet pulses by using optical band pass filters(e.g Gaussian OBPF,WDM DEMUX filter etc)
i will be very thankful to you for help
regards
jawad mirza

[Hanane ALIFDAL]

Hello,
Please I need your help !!
I have an 8-channel WDM system, I’m trying to measure the BER at the 4th channel, I’ve tried the BER analyzer which gives an estimated value of the BER (using the eye opening of eye diagram), but I need to measure the BER using a statistical method (Monte Carlo for exemple)!! how can I do it ?!
P.S. : I’m working with Optisystem v.7

[Marc VerreaultParticipant]

Hi Asmaa,

I’m not sure if my attachment was successfully uploaded.

Here’s a copy and paste of he code just in case:

clearvars;
close all;

% create a COM server running OptiSystem
optsys = actxserver(‘optisystem.application’);

% Section looks for OptiSystem process and waits for it to start
%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Execute the system command
taskToLookFor = ‘OptiSystemx64.exe’;
% Now make up the command line with the proper argument
% that will find only the process we are looking for.
commandLine = sprintf(‘tasklist /FI “IMAGENAME eq %s”‘, taskToLookFor);
% Now execute that command line and accept the result into “result”.
[status, result] = system(commandLine);
% Look for our program’s name in the result variable.
itIsRunning = strfind(lower(result), lower(taskToLookFor));
while isempty(itIsRunning)
% pause(0.1)
[status, result] = system(commandLine);
itIsRunning = strfind(lower(result), lower(taskToLookFor));
end
%%%%%%%%%%%%%%%%%%%%%%%%%

% Open the OptiSystem file defined by the path
directory = strcat(pwd,’\Matlab Call OptiSystem.osd’);
optsys.Open(directory);

% Specify and define the parameters that will be varied
ParameterName1 = ‘Power’;
SignalPower = -20:5:-10; %dBm

ParameterName2 = ‘Length’;
FiberLength = 5:5:15; %meters

% Specify the results that will be transfered from OptiSystem
ResultName1 = ‘Max. Gain (dB)’;
ResultName2 = ‘Min. Noise Figure (dB)’;
ResultName3 = ‘Output : Max. OSNR (dB)’;

Document = optsys.GetActiveDocument;
LayoutMngr = Document.GetLayoutMgr;
CurrentLyt = LayoutMngr.GetCurrentLayout;
Canvas = CurrentLyt.GetCurrentCanvas;

% Specify the components that will have the parameters (results) transfered
Component1 = Canvas.GetComponentByName(‘CW Laser’);
Component2 = Canvas.GetComponentByName(‘EDFA’);
Visualizer1 = Canvas.GetComponentByName(‘Dual Port WDM Analyzer’);

% vary the parameters, run OptiSystem project and get the results
for i = 1:length(SignalPower)
for k = 1:length(FiberLength)

%Set component parameters
Component1.SetParameterValue( ParameterName1, SignalPower(i) );
Component2.SetParameterValue( ParameterName2, FiberLength(k) );

%Calculate
Document.CalculateProject( true , true);

%Acces visualizer results
Result1 = Visualizer1.GetResult( ResultName1 );
Result2 = Visualizer1.GetResult( ResultName2 );
Result3 = Visualizer1.GetResult( ResultName3 );

Gain( (i-1)*length(FiberLength) + k ) = Result1.GetValue( 1 );
NF( (i-1)*length(FiberLength) + k ) = Result2.GetValue( 1 );
OSNR( (i-1)*length(FiberLength) + k ) = Result3.GetValue( 1 );
end
end

%plot graphs
figure
subplot(3,1,1); plot(FiberLength,Gain(1:length(FiberLength)),FiberLength,Gain(length(FiberLength)+1:2*length(FiberLength)),FiberLength,Gain(2*length(FiberLength)+1:3*length(FiberLength)) )
title(‘Signal Gain’)
xlabel(‘Fiber length [m]’)
ylabel(‘Gain [dB]’)
subplot(3,1,2); plot(FiberLength,NF(1:length(FiberLength)),FiberLength,NF(length(FiberLength)+1:2*length(FiberLength)),FiberLength,NF(2*length(FiberLength)+1:3*length(FiberLength)) )
title(‘Noise Figure’)
xlabel(‘Fiber length [m]’)
ylabel(‘NF [dB]’)
subplot(3,1,3); plot(FiberLength,OSNR(1:length(FiberLength)),FiberLength,OSNR(length(FiberLength)+1:2*length(FiberLength)),FiberLength,OSNR(2*length(FiberLength)+1:3*length(FiberLength)) )
title(‘OSNR’)
xlabel(‘Fiber length [m]’)
ylabel(‘OSNR [dB]’)

% close OptiSystem
optsys.Quit;