The acousto-optic filters that depend on the interaction technology between the
optical and ultrasonic waves are considered a high- performance filters as they have the
largest tuning range compared to other filters types. These filters can be used
in optical
WDM (Wavelength Division Multiplexing) networks.
This work aims to study two types of these filters, one operates according to the
non-collinear type of interaction, whereas the other type operates according to the quasicollinear
type of interaction, and compare between these two filters types from the
practical side. Thus, this work aims to show the tilt angle effect of the acoustic wave on the
filter's design and its efficiency in electing the desired optical wave length, in addition to
compare the frequency curves related to these angles in terms of their sensitivity to the
changes of the incidence angle.
The importance of this work lies in proving the efficiency of the filters operating
according to the quasi-collinear type of interaction and their ability to achieve the high
values of quality factor.
