Abstract

Periodic superstructure Bragg gratings are gratings in which in which at least one of the grating parameters vary periodically. They have been studied theoretically [1,2], as well as experimentally in both semiconductor [3-6], and in optical fibers geometries [7-9]. In particular, the recent work in fiber Bragg gratings has focused on sampled gratings in which the grating is made to vanish periodicially, as illustrated in Fig. 1. This figure shows schematically the refractive index n as a function of position. Note that the superstructure period Γ is much larger than the period of the underlying grating, d.

© 1995 Optical Society of America