HOLLOW WAVEGUIDE AND ITS PRODUCTION AS WELL AS LIGHT TRANSMISSION METHOD

Japanese Patent JP3488770

B2

PROBLEM TO BE SOLVED: To lower loss, to enhance mass productivity and to facilitate the increase of a length and the reduction of a diameter by a dielectric layer of a silicate material consisting essentially of silicon oxide or silicon nitride.
SOLUTION: The dielectric substance-contg. metallic hollow waveguide 4 is formed of a metallic waveguide 1, the dielectric layer 2 which is formed on the inside wall of the metallic waveguide 1 and consists of the silicate or siloxane material and a hollow region 3 which is segmented by the inside wall of the dielectric layer 2. In such a case, the absorption peaks intrinsic to the material in an IR wavelength band exist in the silicate or siloxane material used as the dielectric layer 2. These absorption peaks exist discretely with respect to the wavelengths and the signal transmission wavelengths of the laser important for practicable use may be averted. The coefft. of the absorption of the material is large even exclusive of the wavelength bands excluding the wavelength band having the absorption peaks intrinsic to the material when compared with inorg. materials, such as germanium. However, the most of the laser energy transmitted in the hollow waveguide is concentrated to the hollow region having no loss and is merely absorbed in the dielectric layer 2.

JPH0651583	PROBLEM TO BE SOLVED: To manufacture an optical fiber
WO/2021/053766	HOLE-ASSISTED FIBER
JPS6129805	GLASS FIBER FOR OPTICAL TRANSMISSION

Mitsunobu Miyagi
Akifumi Hongo

JP31791195A

January 19, 2004

December 06, 1995

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Mitsunobu Miyagi
Hitachi Cable Ltd.

G02B6/02; G02B6/032; (IPC1-7): G02B6/02; G02B6/20

JP6148440A
JP5188225A
JP63187204A
JP7294762A
JP63266404A
JP519124A
JP196603A
JP53107295A

Nobuo Kinutani

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