Title:
OPTICAL FILTER DEVICE WITH HIGH INDEX SWITCHABLE GRATING
Document Type and Number:
WIPO Patent Application WO/2004/104686
Kind Code:
A1
Abstract:
A waveguide filter device for optical telecommunications network is provided. The device comprises a substrate (1) containing a waveguide (2) disposed close to the surface of said substrate, an overcladding layer (3) overlaid on said substrate and a cover plate (4) overlaid on said overcladding layer. The waveguide has an input port for receiving an input light signal and an output port for outputting the filtered light signal. The overcladding layer and the cover plate lie within the evanescent coupling field of the waveguide. The average refractive index of said overcladding layer is greater than the waveguide core mode index, while the average refractive index of the cover plate is lower than the waveguide core mode index. In a preferred embodiment of the invention the overcladding layer is an Electrically Switchable Bragg Grating.
Inventors:
EDWARD KEAT LEEM CHAN (US)
Application Number:
PCT/US2004/013699
Publication Date:
December 02, 2004
Filing Date:
May 01, 2004
Export Citation:
Assignee:
HOYA CORP (JP)
EDWARD KEAT LEEM CHAN (US)
EDWARD KEAT LEEM CHAN (US)
International Classes:
G02F1/01; G02F1/313; G02F1/1334; (IPC1-7): G02F1/313; G02F1/01
Domestic Patent References:
| WO2003012532A2 | 2003-02-13 |
Foreign References:
| US5937115A | 1999-08-10 |
Other References:
JOHNSTONE W ET AL: "FIBRE OPTIC WAVELENGTH CHANNEL SELECTOR WITH HIGH RESOLUTION", ELECTRONICS LETTERS, IEE STEVENAGE, GB, vol. 28, no. 14, 2 July 1992 (1992-07-02), pages 1364 - 1365, XP000319067, ISSN: 0013-5194
JOHNSTONE W ET AL: "FIBRE OPTIC MODULATORS USING ACTIVE MULTIMODE WAVEGUIDE OVERLAYS", ELECTRONICS LETTERS, IEE STEVENAGE, GB, vol. 27, no. 11, 23 May 1991 (1991-05-23), pages 894 - 896, XP000213698, ISSN: 0013-5194
MOODIE D G ET AL: "WAVELENGTH TUNABILITY OF COMPONENTS BASED ON THE EVANESCENT COUPLING FROM A SIDE-POLISHED FIBER TO A HIGH-INDEX-OVERLAY WAVEGUIDE", OPTICS LETTERS, OPTICAL SOCIETY OF AMERICA, WASHINGTON, US, vol. 18, no. 12, 15 June 1993 (1993-06-15), pages 1025 - 1027, XP000345919, ISSN: 0146-9592
ERDOGAN T ET AL: "TILTED FIBER PHASE GRATINGS", JOURNAL OF THE OPTICAL SOCIETY OF AMERICA - A, OPTICAL SOCIETY OF AMERICA, WASHINGTON, US, vol. 13, no. 2, 1 February 1996 (1996-02-01), pages 296 - 313, XP002055129, ISSN: 1084-7529
JOHNSTONE W ET AL: "FIBRE OPTIC MODULATORS USING ACTIVE MULTIMODE WAVEGUIDE OVERLAYS", ELECTRONICS LETTERS, IEE STEVENAGE, GB, vol. 27, no. 11, 23 May 1991 (1991-05-23), pages 894 - 896, XP000213698, ISSN: 0013-5194
MOODIE D G ET AL: "WAVELENGTH TUNABILITY OF COMPONENTS BASED ON THE EVANESCENT COUPLING FROM A SIDE-POLISHED FIBER TO A HIGH-INDEX-OVERLAY WAVEGUIDE", OPTICS LETTERS, OPTICAL SOCIETY OF AMERICA, WASHINGTON, US, vol. 18, no. 12, 15 June 1993 (1993-06-15), pages 1025 - 1027, XP000345919, ISSN: 0146-9592
ERDOGAN T ET AL: "TILTED FIBER PHASE GRATINGS", JOURNAL OF THE OPTICAL SOCIETY OF AMERICA - A, OPTICAL SOCIETY OF AMERICA, WASHINGTON, US, vol. 13, no. 2, 1 February 1996 (1996-02-01), pages 296 - 313, XP002055129, ISSN: 1084-7529
Attorney, Agent or Firm:
Potts, Jerry R. (Escondido, CA, US)
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