Abstract
This paper described a wavelength-selective couplers dedicated to drop
functionality (spectral-selective couplers dedicated to wavelength demultiplexing). It
is consist of two Y junctions: an input two drop channels and an output. The Y-branches
distributors of optical power were carried out by a specific geometry of Ti:LiNbO<sub>3</sub>
waveguides. Each Y junction is composed by two identical bends jointed at one with a
weak inclination angle to decrease losses. On each arm of the Y-branches, a Bragg
grating (BG) is etched by Focused Ion Beam (FIB) in order to extract a specific
wavelength band. A two-channel configuration is adopted which demonstrate a drop
functionality of two spectral bands centered at 1123 nm and 1527 nm. The complementary
spectrum is avalaible at the coupler output.
© 2011 IEEE
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