Search Results for 'wdm'

[alistuParticipant]

Hi Yasir,

Can you please attach your design file so that I would be able to check it? WDM components and splitters/compbiners definitely cannot be used exchangeably. So could you please upload the OptiSystem file so that it can be seen where the splitter has been used in WDM PON structure?

Regards

[Yasir SaifullahParticipant]

Thanks Fayiqa, My design requirements are 800 Optical Network Units, can I design it with WDM without using splitter?

[FAYIQA NAQSHBANDISpectator]

Hi Yasir

The system shows an error for the power splitter.
Why are you using a splitter in your design ?
I suggest you to use Multiplexers and demultiplexers while working with WDM systems.As long you are not designing a hybrid time and wavelength divison multiplexed system i don’t think there would be a need of a splitter in your design.

Hope its helpful

Regards

[Aabid BabaParticipant]

Hi yousef,
First of all can you please tell what type of WDM system are you designing?
In current scenario most of the systems are WDM based systems. Please make it a bit specific what actually you are designing and accordingly we can suggest few things to you.

Thanks and Regards

[alistuParticipant]

Hi Yousef,

If you are willing to know about WDM being used in passive optical network standards, the only PON standardized with WDM is NGPON2 as far as I am concerned. Otherwise, could you please be more specific about the type of network you are looking for the standards of (for example LAN, or any other networks)?

Regards

[Yousef Fazea]

Dear all,

If WDM performance has been enhanced, then evaluation performance before the enhancement and after should take place.
My Question, Is there any standardize WDM so that we can compare with?

[alistuParticipant]

Hi Tanveer,

Just to get a general idea of how to implement a ring network in OptiSystem, you can refer to the page addressed below:

WDM Ring – Wavelength Independent Subscriber Equipment

However, you are going to need to use your own active components instead, but I think the above page provides useful information for the start.

Regards

[Ranjeet KumarParticipant]

Here, I am uploading a new osd file bidirectional wdm ofdm pon. May this file help you to solve your problems.

[Dr. Dhiman KakatiParticipant]

Hi Nazira, thank you for the response. though I mentioned about the wavelength multiplexing presently I am not using WDM multiplexure here in my case. I just created the dual tone signal in the electrical domain using two sine wave having different frequency for radio over fiber technology as in the attached snapshot and then applied to the Mach zehnder modulator to have the dual wavelength in the optical domain. please have a look into it.

Regards

[Naazira BadarParticipant]

Aabid, I had checked on a 8 channel WDM system. When I changed MUX /DEMUX bandwidth from 10 GHz to 100Ghz, the performance was seen to be improved. How many channels had to you used?

Regards.

[Aabid BabaParticipant]

Yeah naazira ,
I kept the test signal frequencies constant for all the values of bandwidth for MUX/DEMUX. It was a simple WDM system on which i implemented this logic. I believe Alistu had a point. You can refer to the comment #30857 where he has given a logical statement.
I too believed system performance should increase by doing so but i did not happen.

Regards

[FAYIQA NAQSHBANDISpectator]

Hi Dhiman

Yes your system performance does depend on the bit rate.If you want your system to support a high capacity of 20 Gb/s you might need to use amplifiers in your design.
If you are using a WDM MUX and DEMUX in your design.I suggest you to check the power level of your signal at the MUX and DEMUX outputs.You can use a spectrum analyser for the same.Depending on the drop you see at the output of the MUX you can set the required gain of your amplifiers accordingly.

Regards

[Aabid BabaParticipant]

Hello naazira,
I changed the bandwidth of MUX and Demux for a simple WDM system. The output i observed on the visualizer was something i had never seen before. I can post the screenshot of the results. It lead me to conclusion that Alistu is right in saying that bandwidth of signal will remain same even though you change its frequency.
Regards

[Naazira BadarParticipant]

Hi Dhiman

Are you using a WDM MUX?

Regards

[alistuParticipant]

Hi Aabid,

The bandwidth of a Multiplexer or a demultiplexer (the one in your second image) refers to the bandwidth of the filters used for each channel of the implemented WDM system, whereas the bandwidth in some other components such as amplifiers is the bandwidth of operation of that specific component.

Regards