Optical waveguides – Planar optical waveguide
Patent
1998-05-21
2000-02-29
Palmer, Phan T. H.
Optical waveguides
Planar optical waveguide
385131, 385123, 385 37, 65385, G02B 610
Patent
active
060319577
ABSTRACT:
A glass wave guide element, which is small in size and amenable to integration and mass-production, and a method of manufacturing the glass wave guide element are provided. The glass wave guide element includes a core 3 having a diffraction grating formed on an under cladding 2, an over cladding 4 covering the core 3 and a heater 6 for changing the Bragg wavelength of the diffraction grating, the heater being arranged on the over cladding 4. The core 3 and a central portion (2B, 4B) of both claddings in a surrounding portion around the core 3 are formed in a state of being continuously separated along a longitudinal direction of the core 3 from the substrate 1 through a gap 5, and the core 3 and the surrounding portion around the core 3 are formed in a state of being spatially intermittently separated in a width direction of the core 3 from a surrounding portion (2A, 2C, 4A, 4C) of both claddings through a gap.
REFERENCES:
patent: 5467415 (1995-11-01), Presby
patent: 5627933 (1997-05-01), Ito et al.
patent: 5770155 (1998-06-01), Dunphy et al.
patent: 5903697 (1999-05-01), Yamada et al.
Arai Hideaki
Kobayashi Dai
Suzuki Ryoji
Tamura Korenori
Uetsuka Hisato
Hitachi Cable Ltd.
Palmer Phan T. H.
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