  A particular feature of an aperiodic design of cladding of Bragg reflection
waveguides to demonstrate a dispersion blue-shift is elucidated. It is made on
the basis of a comparative study of dispersion characteristics of both periodic
and aperiodic configurations of Bragg mirrors in the waveguide system, wherein
for the aperiodic configuration three procedures for layers alternating, namely
Fibonacci, Thue-Morse and Kolakoski substitutional rules are considered. It was
found out that, in a Bragg reflection waveguide with any considered aperiodic
cladding, dispersion curves of guided modes appear to be shifted to shorter
wavelengths compared to the periodic configuration regardless of the modes
polarization.
