dispersion with notes - Today: Dispersion: Chapter 6...

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Unformatted text preview: Today: Dispersion: Chapter 6 Dispersion • Material • Waveguide • Modal Dispersion Real and Imaginary Index Group Delay and Group Index τ g = 1 / v g = dk / dω Group Velocity Dispersion Ng = n − λ dn dλ L τ = N g (λ ) c Material Dispersion • Frequency dependence of the permittivity n(ω ) = ε ' (ω ) + jε '' (ω ) 2 ( Ne 2 / m)(ω0 − ω 2 ) n(ω ) = 1 + ε o (ω − ω 2 0 [ 22 ) +γ ω 2 2 −j ε o (ω02 − ω 2 ) + γ 2ω 2 2 [ ( Ne 2 / m)γ ω Modal dispersion τ g = 1 / v g = dk / dω Waveguide dispersion ...
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dispersion with notes - Today: Dispersion: Chapter 6...

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