Patent ID: 7809029

Claim:
An article comprising a length of an optical fibre for a laser and a package, the optical fibre comprising a fibre Bragg grating dispersed over a FBG-section of the length of the optical fibre, the package comprising a carrier with a convex carrier surface adapted for supporting at least a supported part of the optical fibre including the FBG-section, the supported part of the optical fibre being mounted on the carrier surface and fixed to the carrier surface on each side of said FBG-section of the optical fibre, the supported part of the optical fibre being held in longitudinal tension during use of the article so as to urge the supported part of the optical fibre against the convex carrier surface so as to prevent or reduce escaping of the supported part of the optical fibre from the convex carrier surface during use of the article, wherein at the supported part of the optical fiber, the optical fiber is in longitudinal tension through an entire cross section of the fiber taken perpendicular to the length of the fiber.