Search Results for 'wdm'

[GAYATHRI P V]

when different channels are multiplexed ( for eg, 193.1,193.2, 193.3,193.4 Thz) ,What will be the centre frequency of the multiplexed signal which is sent through the fiber? when i kept the optical spectrum at the mux it some times shows 193.24 Thz Center frequency.Why is it so??

[MEET KUMARIParticipant]

Sir can you send me the snapshot of bidirectional twdm pon design in optisystem ?

[Sơn Nguyễn Văn]

I am doing homework related to opticsystem, have a few questions want to ask you. Hope you help me.
I’m simulating a WDM PON network, I’m having problems on the upstream line.
I do not get signal after delay block and WDM MUX ES block.
Can you explain me?
Thank you very much.
I HAVE ATTACHED FILE BELOW.

[Umaima Malik]

I need to improve eye diagram and increase quality factor and minimize BER of bidirectional BPON. i’m attaching the file.

[moh ranger]

HI everyone
My thesis about FSO & DWDM .how can i find standard for FSO. like IEEE & ITU-T standard.
is there a standard for FSO link?
Thanks in advance

[Zulfikar Sandy Pratama]

Hello, I have a rof integrated with dwdm-pon system, after the LPF it gives the result of the BER analyzer like this.

My system is basically like this :

prbs and nrz is connected with sine generator by electrical multiplier, then it is modulated with cw laser to go through mux, then a 70 km optical fiber, demux, bessel optical filter, optical amplifier, splitter, APD, then LPF.

Some helps are appreciated.
Thanks..

[Arpita Singh]

I have implemented a design of WDM PON. But now confused if its TWDM PON. Please help me differentiate. Also can you tell me how to convert WDM PON to TWDM PON in case the attached file is WDM PON.

[Naba krushna SabatParticipant]

in wdm system change the parameter of different channel frequency…the frequency must be same as you have taken your input channel frequency..like 193.1 to 193.4 THz.then only you can get your result perfectly…

[GAYATHRI P V]

Dispersion compensation using Fbg for a 4 channel Wdm system ( 193.1-193.4 Thz) , what value must be given for the bandwidth of FBG with center frequency 193.1 Thz for achieving proper compensation? By default the value is 125 GHz

[GAYATHRI P V]

For the performance evaluation of a Wdm system, is there any problem if we demultiplex and analyze the BER of only a single channel in a 4 channel WDM system(193.1-193.4).
Is it necessary to analyse all the channels??? If so then what values should be chosen for the center frequency of optical Gaussian filters for each channel.

P.S: I have only demultiplexed a single channel and the Gaussian filter center frequency was taken as 193.1 Thz

[Ninh Trần]

Hi
I’m Ninh, I’m from Vietnam. My English is poor, but I try my best to describe my problem that I get.
I have problems with TWDM-PON simulation on optisystem 7 for NG-PON2 optical system.
But my knowledge of optical systems is very limited. Please help me and give me some solutions for my study.

[reshma manupati]

How to create noise and how to get graph between osnr and ber in dwdm.

[reshma manupati]

how to tap the bit sequence given at the input for the diagram given in the attachment(how to know what is the output sequence given at the transmitters in 32 bit DWDM)

[Ninh TrầnParticipant]

Hi Mohamed,
Thank you for that, but I am needing to simulate TWDM-PON on Optisystem 7, not WDM PON
please help me.

[Mohamed A. A. AbouseifParticipant]

Hi Ninh,
find attached an example of WDM-PON that might help.

best of luck,
Mohamed Abouseif