Multiple Bragg gratings are fabricated in a single planar lightwave circuit platform. The apparatus comprises a rotatable body that is rotated to a first position to receive an object from an object storage means in an aperture and the rotatable body is then rotated to a second position such that the object received in the aperture is received within a riser. The heat sink is a formed sheet structure, which has been formed into a predetermined shape from a sheet shaped heat sink blank.