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US 10,833,470 B2Granted
Optical fiber and fiber laser
AssigneeFujikura Ltd.
InventorRyokichi Matsumoto
Life of this patent
Estimating the term…
Abstract
An optical fiber includes: an optical waveguide; and a resin coating that is lower in refractive index than the optical waveguide and covers a side surface of the optical waveguide except in a coating-removed section of the side surface. The coating-removed section of the side surface is covered throughout with an inorganic layer that is lower in refractive index than the optical waveguide.
Claims17
An optical fiber comprising:
- an optical waveguide;
- and
- a resin coating that:
- is lower in refractive index than the optical waveguide;
- and
- covers a side surface of the optical waveguide except a coating-removed section of the side surface, wherein
- the coating-removed section is covered throughout with an inorganic layer that is lower in refractive index than the optical waveguide, and
- the inorganic layer is covered by an outer layer that is higher in thermal conductivity than the resin coating.
5 more elements
An optical fiber comprising:
- an optical waveguide;
- a resin coating that:
- is lower in refractive index than the optical waveguide;
- and
- covers a side surface of the optical waveguide except a coating-removed section of the side surface;
- and
- an outer jacket that covers a side surface of the resin coating, wherein
- the coating-removed section is covered throughout with an inorganic layer that is lower in refractive index than the optical waveguide, and
- the inorganic layer is covered by an outer layer that is higher in thermal conductivity than the outer jacket.
6 more elements
An optical fiber comprising:
- an optical waveguide;
- and
- a resin coating that:
- is lower in refractive index than the optical waveguide;
- and
- covers a side surface of the optical waveguide except a coating-removed section of the side surface, wherein
- the coating-removed section is covered throughout with an inorganic layer that is lower in refractive index than the optical waveguide, and
- the inorganic layer is a particle layer comprising inorganic particles.
5 more elements
An optical fiber comprising:
- an optical waveguide;
- and
- a resin coating that:
- is lower in refractive index than the optical waveguide;
- and
- covers a side surface of the optical waveguide except a coating-removed section of the side surface, wherein
- the coating-removed section is covered throughout with an inorganic layer that is lower in refractive index than the optical waveguide, and
- the coating-removed section borders on two coated sections of the optical fiber including a first coated section in which the side surface of the optical waveguide is covered with the resin coating, and
- the inorganic layer is disposed such that a numerical aperture (NA) of the optical waveguide in the coating-removed section is equal to or greater than the minimum value of an NA of the optical waveguide in the first coated section.
6 more elements
Dependencies are inferred from the claim text.