I am plotting optical Gaussian pulse. I have written the following code but not getting answer

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Vijendra Kumar Prajapati 2016-1-20

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https://ww2.mathworks.cn/matlabcentral/answers/264425-i-am-plotting-optical-gaussian-pulse-i-have-written-the-following-code-but-not-getting-answer

P0_dBm = -5; % in dBm P0_watt = 10^((P0_dBm-30)/10); % in watt FWHM = 0.4*1e-9; %in nanometer sigma = FWHM/(2*sqrt(2*log(2))); mu = 0; Amp = sqrt(P0_watt); x = -10:0.1:10; G_pulse =(1/sqrt(2*pi*(sigma)^2))*exp(-(x-mu).^2./(2*(sigma)^2));%%gaussian pulse pulse= G_pulse/max(G_pulse); plot(x,pulse);