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Dispersion relation

Phase velocity and group velocity

Group velocity

{title2=$\Delta t=L|v_{g1}^{-1}-v_{g2}^{-1}|$}

The relative envelope delay accumulated by waves with different group velocities over length $L$. In nonlinear pulse gating this can blur the temporal overlap and limits the useful crystal thickness.


Group-velocity mismatch

Past exam of the nonlinear Optics and Quantum States of Light course of the University of Cambridge / 2012 / Paper 1 / 3 / c / Solution

Past exam of the nonlinear Optics and Quantum States of Light course of the University of Cambridge / 2014 / Paper 1 / 3 / b / Solution

Second-harmonic intensity autocorrelation

Group-velocity mismatch ( $Δ t = L ∣ v_{g 1}^{- 1} - v_{g 2}^{- 1} ∣$ )

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Group-velocity mismatch (Δt=L∣vg1−1​−vg2−1​∣)

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Group-velocity mismatch ( $Δ t = L ∣ v_{g 1}^{- 1} - v_{g 2}^{- 1} ∣$ )

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