Abstract: A photonic integrated circuit including an input for receiving input electromagnetic radiation having a bandwidth greater than 60 nm; a spectral splitter splitting the electromagnetic radiation into a plurality of spectral channels; a modulator for modulating an amplitude and a phase of one or more of the spectral channels so as to form modulated outputs; and a spectral recombiner for combining the modulated outputs into a single output port outputting output electromagnetic radiation having the desired output spectral intensity profile shaped by and synthesized from the modulated outputs.
Type:
Grant
Filed:
September 30, 2022
Date of Patent:
February 13, 2024
Assignees:
CALIFORNIA INSTITUTE OF TECHNOLOGY, OBSERVATOIRE DE LA COTE D'AZUR
Inventors:
Nemanja Jovanovic, Jeffrey B. Jewell, Pradip R. Gatkine, Gautam Vasisht, Charles A. Beichman, Nick Cvetojevic
Abstract: Systems for inspecting a surface of an optical wave originating from an optical device are provided. The optical device includes an exit pupil, and the inspection system includes an optical measuring head and a computer for processing the images from said optical measuring head. The optical measuring head includes a density gradient filter, the density varying periodically in the two directions in space, a matrix frame having at least four identical lenses of square shape of the same focal length and being arranged symmetrically, and a photodetector array, each of the four lenses forming an image of the pupil in the plane of this array. The image processing computer includes computing means for computing the partial derivatives ? ? ? x ? ( x , y ) and ? ? ? y ? ( x , y ) of the wave surface ?(x, y) in the plane of the exit pupil.
Type:
Grant
Filed:
January 21, 2020
Date of Patent:
September 12, 2023
Assignees:
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, OBSERVATOIRE DE LA COTE D'AZUR, UNIVERSITE COTE D'AZUR, UNIVERSITE GRENOBLE APLES