Holographic gratings are modeled and designed for path-reversed
substrate-guided-wave wavelength-division demultiplexing (WDDM) as
a continuation of earlier research [Appl. Opt. 38, 3046 (1999)]. An efficient and practical method is developed to
simulate the slanted volume holographic gratings. The trade-off
between dispersion and the bandwidth of the holograms is
analyzed. A 60° (incident angle of the grating)/60°
(diffraction angle of the grating in air) grating structure is
selected to demultiplex optical signals in the 1555-nm spectral region,
and a 45°/45° grating structure is chosen for the spectral region
near 800 nm. Experimental results are consistent with the
simulation results for these two WDDM devices. A four-channel WDDM
is also demonstrated at a center wavelength of 1555 nm and with a
channel spacing of 2 nm.
© 1999 Optical Society of America
Equations on this page are rendered with MathJax. Learn more.