Abstract: A photonic device/a method of forming a photonic device comprising a length of optical fiber loaded in tension over a portion of its length, an in-fiber Bragg grating formed within the tensile loaded portion of the length of fiber, two longitudinally spaced apart supports for the fiber, longitudinally aligned channels in the supports, for receiving the fiber, a carrier in which the supports are located, and glass solder contained within the channel anchors the embedded fiber to the support, the supports being formed from a material that has a coefficient of thermal expansion greater than that of the glass solder.