Peaks search error in a gaussian Comb

Hello eveyone

I try to annalyse a comb of gaussian.

But the peaksearch function cant.

c=299792458;
LambdaC=1030; % [nm]
FreqC=LambdaC.*1e-9./c; %[Hz]
Freq1=c./(1014.5.*1e-9).*1e-12; %THz
Freq2=c./(1065.58.*1e-9).*1e-12;%THz
FreqTHZ=Freq2:0.0005:Freq1;
FreqTHZ=round(FreqTHZ*1000)/1000;
Lambda=(fliplr(c./(FreqTHZ.*1e12))).*1e9;% [nm]

Largeur= 0.1;% Largeur de la porte
DL = 0.3; % Espacement des portes



%% Gaussienne
Lc(1)=1014;
Peigne = zeros(length(Lambda),1);

for ii = 1 : length(Lambda)
   Tempo=(exp(-log(2).*((Lambda-Lc(ii))/((Largeur)/(2))).^2));
   Peigne=Peigne+Tempo';
   
        Lc(ii+1)= Lc(ii)+DL;

end

[P_REF_Lambda,Idx_REF_Lambda] = findpeaks(Peigne);

I am not able to find the peak index

Do you have an idea why?

Best regards