3d47813f1e
eye diagram working for all signals again... A problem: I found that the Tx eyes look weird (i.e. PAM-8) vibecoded ML_MLSE_GPU ... a bit faster :-)
35 lines
1011 B
Matlab
35 lines
1011 B
Matlab
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% plot_dispersion_models
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% ------------------------------------------------------------
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% Visualizes exact and linearized chromatic dispersion D(λ)
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% around the zero-dispersion wavelength (ZDW).
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%
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% Inputs:
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% lambda0_nm - ZDW in nm
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% S0 - dispersion slope at ZDW [ps/(nm^2·km)]
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% ------------------------------------------------------------
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lambda0_nm = 1310;
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S0 = 0.08;
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% wavelength axis around ZDW
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lambda_nm = linspace(lambda0_nm-40, lambda0_nm+40, 400);
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% exact dispersion model
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D_exact = (S0/4) .* ( ...
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lambda_nm - (lambda0_nm^4)./(lambda_nm.^3) );
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% linearized model around ZDW
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D_lin = S0 .* (lambda_nm - lambda0_nm);
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% plot
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figure('Color','w'); hold on;
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plot(lambda_nm, D_exact, 'LineWidth',2, 'DisplayName','Exact model');
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plot(lambda_nm, D_lin, '--', 'LineWidth',2, 'DisplayName','Linearized model');
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xlabel('Wavelength \lambda [nm]');
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ylabel('Dispersion D(\lambda) [ps/(nm·km)]');
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title('Chromatic Dispersion Around the ZDW');
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legend('Location','best');
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grid on; box on;
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