what is the matlab code for ploting dispersion against wavelength (for chromatic dispersion)?

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Ahmed 2022-12-27

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评论： Star Strider 2022-12-29

采纳的回答： Star Strider

D=(-lamda*3*10^8)*(d^2(neff)/d(lamda)^2)

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Hiro Yoshino 2022-12-27

whad does "d" stand for? Is neff the refractive index?

Ahmed 2022-12-28

Yes neff the refractive index

The second derivative

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Star Strider 2022-12-28

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在 MATLAB Online 中打开

Try this —

syms c lambda n_eff(lambda)

D_T = -(lambda/c) * diff(n_eff,2)

D_T(lambda) =

See MATLAB Onramp

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Ahmed 2022-12-29

Thank you Dr

Star Strider 2022-12-29

As always, my pleasure!

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Hiro Yoshino 2022-12-28

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在 MATLAB Online 中打开

SiO2.txt

You can use gradient to calculate this problem numerically.

Let me use SiO2 as an example.

data = readtable("SiO2.txt");

Warning: Column headers from the file were modified to make them valid MATLAB identifiers before creating variable names for the table. The original column headers are saved in the VariableDescriptions property.
Set 'VariableNamingRule' to 'preserve' to use the original column headers as table variable names.

lambda = data.Wavelength_nm_;

n = data.n;

c = 3e8;

plot(lambda,n);

xlabel("\lambda (nm)");