We present a novel surface-normal optical wavelength-division-demultiplexer (WDDM), working at 750, 770, 790, 810, 830 and 850 nm wavelengths. The device is based on an integration of a planar waveguide, a substrate waveguide and waveguide holograms. The unique optical in-plane to surface-normal conversion converts the difficult three spatial and three angular edge coupling problem into a planar surface one, resulting in a practical compact face-to-face packaging between the photodetector array and the demultiplexer. A six-channel wavelength-division-demultiplexer with equally spaced collinear surface-normal outputs are designed and demonstrated in a polymer-based planar waveguide in conjunction with holograms on a glass substrate.
We report a 1-D, 1 Gbit/sec, fully integrated 1-to-10 optical planar bus array. The optical bus is made out of a thin glass substrate in conjunction with a 1-D hologram array, integrated on the surface. Based on the dispersion relation, the angular misalignment can be used to determine the wavelength tolerance of the optical bus, which is a representation of its modulation bandwidth. Using the experimental results of the angular tolerance, which is determined to be 0.5 degree(s), it can be shown that a wavelength coverage of 42 nm is achievable when this optical bus is used. The corresponding frequency is 7.5 THz.
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