Dispersion of multiple V-groove guide

A multiple V-groove guide is rigorously analyzed with the Fourier transform and mode matching. A new rigorous dispersion relation is presented in fast -convergent series, which is efficient for numerical calculation. The propa gation characteristics and their H-2-field distributions are presented in t erms of the double and triple V-groove guides. A closed-form dispersion rel ation based on a dominant-mode approximation is shown lo be accurate for mo st practical applications. (C) 2001 John Wiley & Sons, Inc.