- This topic has 11 replies, 4 voices, and was last updated 8 years, 10 months ago by
Rajguru M. Mohan.
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April 7, 2016 at 8:18 am #36011
jyoti raina
SpectatorHello Everybody.
I am actually designing a four channel basic wdm system and no doubt i am able to calculate the min ber and max quality factor of each receiver on the reception side.. Here i would like to ask if it possible to calculate the overall signal to noise ratio of the whole system . Please can you tell me if there is some procedure or method to do so.. i want to calculate the optical signal to noise ratio (OSNR) of the system.. I hope i will get some response from you people..
Thanking you in advance.with Regards
jyoti sharma -
April 7, 2016 at 8:42 am #36013
Dr. Dhiman Kakati
ParticipantHi Jyoti you can use WDM analyzer for calculation of Optical Signal to noise ratio. I have attached here with a sample that may find beneficial. Thanks
Regards,
Dhiman -
April 7, 2016 at 12:42 pm #36030
jyoti raina
SpectatorHi Dhiman Sir.. Thanks a lot. Thank you for your kind efforts.
I Shall try this and see if i get what i want.. I am again thankful to you.
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April 7, 2016 at 1:22 pm #36039
Dr. Dhiman Kakati
ParticipantYou are most welcome Jyoti.
Regards,
Dhiman
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April 8, 2016 at 2:29 am #36075
jyoti raina
SpectatorThanks Dhiman Sir..
It was really helpful.. I appreciate your kind efforts.-
April 8, 2016 at 3:10 am #36082
Dr. Dhiman Kakati
ParticipantYou are most welcome Jyoti, Nice to see some good question from your side in the forum.
Regards,
Dhiman
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April 8, 2016 at 5:33 am #36092
jyoti raina
SpectatorHi Dhiman Sir..
Thank you for your appreciation..With regards
jyoti Raina -
April 10, 2016 at 5:27 am #36213
SAHIL SINGH
ParticipantHi Jyoti
As rightly mentioned by Dhiman we can use WDM analyzer for calculation of Optical Signal to noise ratio… A very useful point figured out by Dhiman.. Hope this helps
Regards
Sahil Singh-
April 10, 2016 at 5:35 am #36216
jyoti raina
SpectatorHi Sahil Sir..
Thanks for your reply..indeed it was helpful.i found it on the forum too..WDM analyzer is used to measure OSNR and SNR directly..Thanking you..
With Regards
Jyoti Raina
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April 10, 2016 at 6:38 am #36219
SAHIL SINGH
ParticipantHi Jyoti Raina,
You are welcome and as always optiwave forum has provided very useful information… Glad to know that your query was resolved…All the best
Regards
Sahil Singh -
April 10, 2016 at 8:05 am #36227
jyoti raina
Spectatorhi sahil sir..
i truly agree with you..With regards
jyoti raina -
April 15, 2016 at 7:21 am #36880
Rajguru M. Mohan
ParticipantHi Jyoti,
We could measure OSNR with the help of BER of BER analyzer,
The formula for calculating OSNR from BER is :
We can also use WDM analyzer to check the OSNR.
Given the OSNR, the empirical formula to calculate BER for single fiber isLog10 (BER) = 10.7-1.45 (OSNR)
For Example:
Assume that OSNR = 20.5 dB
Then Log10 (BER) = 10.7-1.45 (20.5) = -19.025
Therefore BER = 10^(-19.025)
BER is approx 10^-19
I think it is appropriate way to calculate BER from OSNRHope this will help you.
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