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基于耦合模理論的光纖光柵MATLAB反射譜仿真,有圖,有代碼
代碼片段和文件信息
L=0.01;
neff=1.447;
c=1*1e-7/(2*neff);
deltaneff=0.0004;
N=100;
M=2000;
lamda1=1548;
lamda2=1552;
lamda=linspace(lamda1*1e-9lamda2*1e-9M);
deltalamda=(lamda2*1e-9-lamda1*1e-9)/(M-1);
for?k=1:M
????F=[10;01];
????for?n=1:N
deltaneff_z=deltaneff;
??%g=4;
???%?deltaneff_z=deltaneff*exp(-g*g*((2*n-1-N)/(2*N))^2);
??%??H=0.5;
??%deltaneff_z=deltaneff*(1+H*cos(pi*(2*n-1-N)/N))/(1+H);
????lamdaD=1550*1e-9-L*neff*c+2*neff*c*(L*n/N-0.5*L/N);
????sigma=2*pi*neff*(1/lamda(k)-1/lamdaD)+2*pi*deltaneff_z/lamda(k)+(4*pi*neff)*c*(2*(neff+deltaneff))*(-L/2+n*L/N)/lamdaD^2;
????kac=pi*deltaneff_z/lamda(k);
????RB=sqrt(kac^2-sigma^2)+eps;
????F=F*[cosh(RB*L/N)-(sigma/RB)*sinh(RB*
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