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xiegangmai: ½ð±Ò+3, ¹ÄÀøÌÖÂÛ½»Á÷£¡ 2013-07-14 22:19:37
format long e
for i=1:81
n(i,1) = neff(i,1);
[n_imag,n_pos] = max(imag(neff(i,2:11)));
n(i,2) = real(neff(i,n_pos+1));
end






lamda = n(:,1);   
pcfneff = n(:,2);
P = polyfit(lamda,pcfneff,5);
tx =linspace(1.3e-6,1.8e-6,10000);
ty = polyval(P,tx);
c=3e8;
D1=-1*tx(1:end-2)./3e8.*(diff(diff(ty)./diff(tx))./diff(tx(1:end-1)))*40e6;
plot(tx(1:end-2),D1,'linewidth',1.5)
grid on;
xlabel('\lambda(\mum)')
ylabel('Didpersion(ps/(nm.m)')
title('Dispersion of the PBG guiding PCF')
hold off
ÕâÊÇÎÒÃÇʦÃÅʦÐÖ±àµÄmatlab£¬ÄãÓÃcomsol with matlab£¬¾Í¿ÉÒÔËãɫɢ¡£É«É¢¹ØÏµ£¬dw/dk.¾Í¿ÉÒÔÁË£¬ºóÃæµÄÒ²ÊÇÎÒÒª×öµÄ£¬ÒÔºó¿ÉÒÔ½»Á÷¡£
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