Planar-waveguide integrated spectral comparator.
A cost-effective yet robust and versatile dual-channel spectral comparator is presented. The silica-on-silicon planar-waveguide integrated device includes two holographic Bragg-grating reflectors (HBRs) with complementary spectral transfer functions. Output comprises projections of input signal spectra onto the complementary spectral channels. Spectral comparators may be useful in optical code-division multiplexing, optical packet decoding, spectral target recognition, and the identification of molecular spectra. HBRs may be considered to be mode-specific photonic crystals.
Mossberg
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TW
LightSmyth Technologies, Inc., 860 West Park, Suite 250, Eugene, Oregon 97401, USA. twmoss@lightsmyth.com
Iazikov
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D
Greiner
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