The MATLAB coding for solving second order differential equation(D(λ)=- (λ /c)*(d^2n/d λ^2)) of wave guide dispersion is heavily needed. I have values of effective index n, c is constant and variable lambda is varied from 1.34-1.70 um . I have already completed the MATLAB coding of material dispersion, confinement loss. But i am failing to do coding of wave guide dispersion. I can use diff command if n is not given . But here both n and lambda is known. Thats why i face problem as there is no equation of effective index,n. So please anyone help me.It is urgently needed.......
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