Laser system using low-chlorine hollow core optical fiber
AssigneeNkt Photonics A/S
InventorsJens Kristian Lyngsø, Christian Jakobsen, Jesper Skov Gretlund, Harald R. Simonsen
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Abstract
An optical fiber having an axial direction and a cross section perpendicular to the axial direction, and a method and preform for producing such an optical fiber. The optical fiber is adapted to guide light at a wavelength λ, and includes a core region, an inner cladding region surrounding said core region, and at least one of a first type of feature including a void and a surrounding first silica material. The core, the inner cladding region and the first type of feature extends along said axial direction over at least a part of the length of the optical fiber. The first silica material has a first chlorine concentration of about 300 ppm or less.
Claims20
A laser system comprising a hollow core optical fiber, said optical fiber having an axial direction and a cross section perpendicular to said axial direction, said optical fiber comprising:
- a hollow core region,
- an inner cladding region surrounding said core region, and
- an end facet at an end of the optical fiber,
- where at least a portion of the optical fiber is comprised of a first type of feature comprising a void and a surrounding first silica material, said first type of feature extending along at least a part of said axial direction, said first silica material having a first chlorine concentration, c1, of about 300 ppm or less, providing that diffusion of chlorine to the end facet and resulting chlorine-induced degradation of the fiber end facet is mitigated.
Dependencies are inferred from the claim text.