Patent ID: 7589896
Filing Date: 2009-09-15
Classification: G02B,H01S

Abstract:
1. An optical pulse-width modifier structure, comprising: a first diffraction grating; an optically unpowered reversing mirror, wherein an optical path extends between the first diffraction grating and the optically unpowered reversing mirror; a second diffraction grating lying on the optical path between the first diffraction grating and the optically unpowered reversing mirror; and a set of optical powered mirrors lying on the optical path between the first diffraction grating and the second diffraction grating, wherein the diffraction gratings and mirrors are positioned such that an input light beam in order is diffracted from the first diffraction grating, reflected from each of the set of optically powered mirrors, diffracted from the second diffraction grating, reflected from the optically unpowered reversing mirror back to the second diffraction grating, diffracted from the second diffraction grating, reflected from each of the set of optically powered mirrors, and diffracted from the first diffraction grating as an output light beam.