Search Results for 'wdm'

[Yasir Saifullah]

Hello,
1. Can some one check the performance of system attach with this post? is it working good or its need any improvements?
2. This system is using 16 QAM for symbol mapping, please do necessary changes in .osd to make it work for 4-QAM and 64 QAM.
Thanks in advance.

[Ranjeet KumarParticipant]

Hi,
I am uploading osd file of WDM with 8 channel over 500 km with good Q-factor having advanced modulation formats of CSRZ. you can vary no. of loops, bit rate, channel spacing andalso modulation formats and filters and its bandwidth.

[Ranjeet KumarParticipant]

Hi Lim,
Power splitter is passive device used in PON networks just as WDM-demux in WDM(active) networks. It splits the power onto different ports according to its design, the no. of ports it contains. It may be unidirectional or bidirectional.

[Ranjeet KumarParticipant]

hi,
You can see the “WDM Ring WISE NRZ DM”example in Metro Systems in Metro and Access Systems which i uploaded.

[Aabid BabaParticipant]

Hi fayiqa,
surely i will do it.
As far as i am concerned as of now i have not come across any OSNR calculator ( talking about implementation of of my own case) , however , there may be some which we are unaware of. And the WDM analyzer i mentioned in above comment, i have used it for WDM system having 4 channels. We shall explore it hopefully.
regards

[FAYIQA NAQSHBANDISpectator]

Hi aabid

Not a problem.You can check whenever its convenient for you and let me know if WDM can be used for measuring the OSNR for any general system or is thr any other component that can give the value of OSNR in optiwave.

Regards

[Aabid BabaParticipant]

Hello fayiqa,
you have put forth a very important point. Actually i have used only WDM analyzer only in WDM systems i am not sure about rest of designs. However i have a slight idea that it has some option for changing ports though i am not sure. I am not having access to the tool right else i would have seen it. If you are on tool you could check it if possible.
regards

[FAYIQA NAQSHBANDISpectator]

Hi every one.

What I understand from the discussion is that while working with WDM systems we can use a WDM analyser as aabid suggested to check the SNR values.But for any system in general we can use an electrical analyser for calculating SNR.
But wht if we want to calculate the Optical signal to noise ratio for any system..WDM analyser does give the value of OSNR but cannot be used in a system where wavelength division multiplexing is not used.So is there any component which can be used to calculate OSNR for any system design nt just being specific to WDM systems.

Thanks and Regards

[Ranjeet KumarParticipant]

Hi ZULKARNAIN,
So, i am uploading 8 channel MDRZ modulation schemes of WDM system. You can plot its results vs optical power of laser

[Ranjeet KumarParticipant]

Hi ZULKARNAIN,
So, i am uploading 8 channel DRZ modulation schemes of WDM system. You can plot its results vs optical power of laser

[Ranjeet KumarParticipant]

Hi ZULKARNAIN,
You can also vary laser power for advanced modulation schemes like CSRZ, MDRZ, DRZ and plot the simulated results like Q-factor and Min. BER against Optical power.
So, i am uploading 8 channel CSRZ modulation schemes of WDM system.

[Aabid BabaParticipant]

Hello ranjeet,
Can you please tell me where in WDM analyzer are we able to determine spectral efficiency of the system.
As far as i know there is nothing like spectral efficiency parameter in WDM analyzer , may be i have missed it or something like that. Can you please also attach a screenshot. I am not sure though.
Regards

[Ranjeet KumarParticipant]

Hi,
I am here uploading TWDMPON Osd file.

[Ranjeet KumarParticipant]

Hi,

I agree with Alistu Sir, there is no such parameters like Spectral Efficiency in optisystem.
As far as i know Spectral efficiency (bits/sec/Hz) = Bit rate / Allocated bandwidth. For spectral efficiency we use WDM analyzer.

[Aabid BabaParticipant]

Hi fayiqa,
As far as i know if you are designing a WDM system , then i believe you can use WDm analyzer present in the visualizer library of the optisystem. I gives you the SNR/OSNR of each channel in addition to signal power and noise power. However, you can verify it if we are able to calculate SNR of whole deign as a whole. Kindly check the screenshot below. Hope it helps.
Regards