Optical waveguide and process for producing it

Details Optical waveguide and process for producing it Optical waveguide and process for producing it

1997-01-28

1998-08-04

Ngo, John

Optical waveguides

With optical coupler

Input/output coupler

385142, 385144, 385147, G02B 634

Patent

active

057907269

ABSTRACT:
This invention provides an optical waveguide having diffraction gratings with sufficiently high reflectivity, a waveguide member for obtaining the optical waveguide, and a production process thereof. An optical waveguide in which desired diffraction gratings are formed in a core and in a cladding at a predetermined portion by using a waveguide member in which germanium dioxide is added in the core and in the cladding and irradiating the predetermined portion of the waveguide member with interference fringes of ultraviolet light. By this, the optical waveguide according to the present invention reflects guided light throughout the entire mode field region, thus having a high reflectivity.

REFERENCES:
patent: 4770898 (1988-09-01), Sugai et al.
patent: 4820018 (1989-04-01), Melman et al.
patent: 4915717 (1990-04-01), Watanabe et al.
patent: 5400422 (1995-03-01), Askins et al.
patent: 5461687 (1995-10-01), Brock

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