Four wave mixing

[Leeba Babu]

Can 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?

[prakash jat]

by spectrum analyzer ,
you can check both separately (at tx and rx)
see difference of above two

[Leeba Babu]

Thanks 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?

[Damian Marek]

Try the Optical Subtractor from the Signal Processing Library/Arithmetic/Optical folder I think it should do the trick!

[prakash jat]

then use dual port spectrum analyzer in compare section

[Alessandro Festa]

Hi Leeba, have you tried to export the spectra in .txt and then use excel to subtract them?

[umer ashraf wani]

https://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

[Rajguru M. Mohan]

Hi 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 (

[Rajguru M. Mohan]

Hi,
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,

[Hamza Ali Abbas Khan]

Hi All.

Can we use FBG for four wave mixing here?
Thanks
Regards

[Author]

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