Beam propagation method: Difference between revisions

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</math>
with the field written as,
:<math>E(x,y,z,t)=\psi(x,y,z)\exp(-j\omega t)</math>.
 
Now the spatial dependence of this field is written according to any one [[Transverse mode|TE or TM]] polarizations
:<math>\psi(x,y) = A(x,y)\exp(+jk_o\nu y)
</math>,
with the envelope