Method and ultrafast laser processing system for forming a diffractive structure in the optical fiber

摘要

Method and ultrafast laser processing system for forming a diffractive structure on the optical fiber (124) of. I mounted the long axis perpendicular to the beam path of the laser pulse, the fiber. Illuminates the one region of the fiber, it is captured by two cameras (132,302). These cameras are positioned to substantially orthogonal. I to determine the position of the beam spot. Beam spot is positioned at the start of the region. This position is a position within the portion to be processed of the fiber, the beam path such as through the longest length of the material. Passes all of the partial beam spot to be processed, along a path that is designed to the beam path does not pass through the machined material, to scan the beam spot. While scanning the beam spot, and generates a laser pulse having a duration of about 1ns or less.