- This topic has 10 replies, 7 voices, and was last updated 8 years, 1 month ago by
Hamza Ali Abbas Khan.
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AuthorPosts
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January 21, 2016 at 1:44 am #29239
Leeba Babu
ParticipantCan anyone please say how to measure the effect of FWM by subtracting input optical spectrum from the output spectrum. How can we subtract two spectrums in optisystem?
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January 21, 2016 at 1:48 am #29241
prakash jat
Participantby spectrum analyzer ,
you can check both separately (at tx and rx)
see difference of above two -
January 21, 2016 at 1:52 am #29242
Leeba Babu
ParticipantThanks Prakash for your reply.
Yes, it is possible to see the difference visually . But i need to get a spectrum by taking the difference of the two spectrums. Can we do it in optisystem? Is it possible to subtract two spectrums?-
January 25, 2016 at 8:52 am #29278
Damian Marek
ParticipantTry the Optical Subtractor from the Signal Processing Library/Arithmetic/Optical folder I think it should do the trick!
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January 21, 2016 at 1:59 am #29243
prakash jat
Participantthen use dual port spectrum analyzer in compare section
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January 21, 2016 at 6:21 am #29244
Alessandro Festa
ParticipantHi Leeba, have you tried to export the spectra in .txt and then use excel to subtract them?
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May 3, 2016 at 12:39 pm #38763
umer ashraf wani
Participanthttps://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjeoYTtq77MAhVCBo4KHV8YBYAQFggfMAA&url=http%3A%2F%2Foptiwave.com%2Fresources%2Fapplications-resources%2Foptical-system-validation-of-fwm-effect%2F&usg=AFQjCNE9nAcsz83KhxQniFrjYynWMa9BjA&sig2=uEA7nu0W443zXPlNFABPEA
https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0ahUKEwjeoYTtq77MAhVCBo4KHV8YBYAQFgg0MAM&url=http%3A%2F%2Foptiwave.com%2Fforums%2Ftopic%2Ffour-wave-mixing-2%2F&usg=AFQjCNGCeJP5JgdOjW0Ev5N0UNUSLP2woA&sig2=Tc79DsnB47SNjX8duLGU3Q
https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=8&cad=rja&uact=8&ved=0ahUKEwjeoYTtq77MAhVCBo4KHV8YBYAQFghQMAc&url=http%3A%2F%2Fwww.iasj.net%2Fiasj%3Ffunc%3Dfulltext%26aId%3D42541&usg=AFQjCNEBrCd7zU-iLTgHCcoMJt-0XqlQmw&sig2=o99D5TQRj8UQ-npl3Sdd0A
https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=10&cad=rja&uact=8&ved=0ahUKEwjeoYTtq77MAhVCBo4KHV8YBYAQFghbMAk&url=http%3A%2F%2Fopt.zju.edu.cn%2Feclass%2Fattachments%2F2011-10%2F01-1318925094-55882.pdf&usg=AFQjCNHNrloWzykAVdBQ7nOWoPMICwyjJg&sig2=s1vVhT1z9EZWCKVdHoWJSQ -
May 3, 2016 at 5:11 pm #38783
Rajguru M. Mohan
ParticipantHi Leeba,
I don’t think we could measure four-wave-mixing in optisystem, but we utilize for measuring the ratio between the third- and the fourth-order dispersion coefficients ( -
May 3, 2016 at 5:14 pm #38784
Rajguru M. Mohan
ParticipantHi,
In addition to this i want to share some information about Four Wave Mixing, as Four-wave mixing (FWM)
is a phenomenon that must be avoided in DWDM transmission, but depending on the application it is the basis of important second-generation
optical devices and optical device measurement technology.
It is one of major issues related to DWDM restricting its performance,
but in the transmission of dense wavelength-division multiplexed
(DWDM) signals, FWM is to be avoided, but for certain
applications, it provides an effective technological basis
for fiber-optic devices. FWM also provides the basic technology
for measuring the nonlinearity and chromatic dispersion
of optical fibers.
Four-wave mixing (FWM) is a type of optical Kerr effect, and occurs
when light of two or more different wavelengths is
launched into a fiber. Generally speaking FWM occurs
when light of three different wavelengths is lauched into a
fiber, giving rise to a new wave (know as an idler), the
wavelength of which does not coincide with any of the others.
FWM is a kind of optical parametric oscillation.Thanks,
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June 11, 2016 at 8:50 pm #39987
Hamza Ali Abbas Khan
ParticipantHi All.
Can we use FBG for four wave mixing here?
Thanks
Regards
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