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I'm trying to fit z-scan data (two-photon absorption) using the equations below in Matlab but I'm unsure how to go about this. I measured T(z) and the ultimate goal is to elucidate beta.
I've tried cftool but the complexity of the system of equations has made it difficult
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Sanjay kannan M
Sanjay kannan M le 29 Jan 2019
Modifié(e) : Sanjay kannan M le 29 Jan 2019

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https://in.mathworks.com/matlabcentral/fileexchange/70114-open-aperture-z-scan-fit
Check this out.
You can obtain TPA co-efficient.
Feel free to give feedback.

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