Optical hollow waveguide, method for fabricating the same, and l

Details Optical hollow waveguide, method for fabricating the same, and l Optical hollow waveguide, method for fabricating the same, and l

1997-01-15

1998-03-17

Palmer, Phan T. H.

Optical waveguides

Optical fiber waveguide with cladding

Utilizing nonsolid core or cladding

385141, 385143, G02B 602

Patent

active

057296464

ABSTRACT:
A polyimide resin layer is formed on an inner surface of a metal pipe or a non-metallic pipe having a metal thin film on an inner surface to provide an optical hollow waveguide. The polyimide resin layer is transparent relative to a wavelength band of a laser light transmitted through the optical hollow waveguide. The optical hollow waveguide is fabricated by supplying solution of polyimide precursor to a hollow internal of the metal pipe or the non-metallic pipe, and heating and drying the solution to provide a polyimide resin layer. The solution-supplying step and the solution-heating and drying step are repeated to increase a thickness of the polyimide resin layer up to a predetermined value.

REFERENCES:
patent: 5276761 (1994-01-01), Shimoyama et al.
patent: 5497440 (1996-03-01), Croitoru et al.
patent: 5497441 (1996-03-01), Croitoru et al.

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