title: Integrated waveguide gratings for wavelength-demultiplexing of free space waves from guided waves.
abstract: Optical waveguide demultiplexer was designed and fabricated by integration of two types of gratings, namely, guided-mode-selective focusing grating couplers (GMS-FGCs) and different-guided-mode-coupling distributed Bragg reflectors (DGM-DBRs) in a slab waveguide for constructing a wavelength-division-multiplexing chip-to-chip optical interconnecting board. In the waveguide demultiplexer, guided signal waves were separated wavelength-selectively by DGM-DBRs, and coupled out by GMS-FGCs to focused free space waves. Two-channel demultiplexing with 5-nm-wavelength spacing was demonstrated at around 850-nm wavelength.
authors.forename: Kenji
authors.initials: K
authors.lastname: Kintaka
authors.forename: Junji
authors.initials: J
authors.lastname: Nishii
authors.forename: Junpei
authors.initials: J
authors.lastname: Ohmori
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Imaoka
authors.forename: Masaaki
authors.initials: M
authors.lastname: Nishihara
authors.forename: Shogo
authors.initials: S
authors.lastname: Ura
authors.forename: Ryohei
authors.initials: R
authors.lastname: Satoh
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Nishihara