Abstract
This paper presents results from the theoretical and experimental
analysis of add/drop filters based on the grating-frustrated coupler (GFC).
GFC filtering heavily relies on synchronous operation, which is difficult
to achieve without ad hoc postfabrication
processing. The double-GFC (DGFC) is analyzed here in detail as an add/drop
filter to reliably achieve synchronism. The DGFC is composed of two gratings
to provide a simple method to match the effective indices of the two branches
of the coupler. Usefully, the DGFC can also be used as an add/drop filter
in two different bands when appropriately designed. Theoretical and experimental
results are presented to validate the robustness of the proposed design. The
results presented here have been obtained for optical structures working at
microwave frequencies to reduce device fabrication complexity while gaining
a greater insight into the device operation. However, the concepts discussed
in this paper are scalable to the optical domain.
© 2009 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription