title: Planar-waveguide integrated spectral comparator.
abstract: 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.
authors.affiliation: LightSmyth Technologies, Inc., 860 West Park, Suite 250, Eugene, Oregon 97401, USA. twmoss@lightsmyth.com
authors.forename: T W
authors.initials: TW
authors.lastname: Mossberg
authors.forename: D
authors.initials: D
authors.lastname: Iazikov
authors.forename: C
authors.initials: C
authors.lastname: Greiner