Multi-Pass Cell - TTL@HKU

Herriott geometry · linear Gaussian-beam propagation
g1 = 1 - L/R1--
g2 = 1 - L/R2--
g1 g2--
round-trip angle--
nearest reentrant--
stable
--
3D cell & beam pathdrag to orbit · scroll to zoom
Spot pattern on mirrorfront view
mirror
Transverse intensity |E|2
plane z
Beam radius w(z) & Gouy phasesingle pass, axis z
Linear regime, gas index n = 1.000. Beam rendered from the analytic q-parameter (exact for a Gaussian input); the cell is two concave mirrors as thin lenses f = R/2 separated by free space L. Spot positions follow the Herriott recursion x_m = rho cos(phi_0 + m theta/2).
beam segment w(z) envelope optical axis / Gouy phase
peak power P0--
B-integral--
spectral broadening--
input FWHM--
TL after broadening--
compressed FWHM--
--
Spectrum: input vs outputSPM broadening
Temporal profilepower vs time
Spectral phaseoutput, rad
Evolution along the cellspectrum vs pass