The reflection coefficients of the shorted guides can be computed as [[GAMMA].sub.[L.sub.i]] = [e.sup.-j2[beta][L.sub.i]], where [beta] is the waveguide propagation
constant and [L.sub.i] are the lengths of the shorted guides.
Grischkowsky, "Single-mode waveguide propagation
and reshaping of sub-ps terahertz pulses in sapphire fibers," Applied Physics Letters, Vol.
Optical field for the 2x3 moderator at the end of waveguide propagation
is as shown in Figure 7.
7 are presented dependences of the waveguide propagation
constant of the main mode [HE.sub.11], the first higher mode EH11 and the second higher mode H[E.sub.12] on the frequency.