US 11,947,101 B2
Devices and methods for transporting and controlling light beams
Hervé Rigneault, Allauch (FR); Géraud Bouwmans, Cysoing (FR); Esben Andresen, Lille (FR); Siddarth Sivankutty, Marseilles (FR); Viktor Tsvirkun, Marseilles (FR); and Olivier Vanvincq, Dunkirk (FR)
Assigned to Centre National de la Recherche Scientifique, Paris (FR); Université d'Aix-Marseille, Marseilles (FR); Université de Lille, Lille (FR); and Ecole Centrale de Marseille, Marseilles (FR)
Appl. No. 17/278,026
Filed by Centre National de la Recherche Scientifique, Paris (FR); Université d'Aix-Marseille, Marseilles (FR); Université de Lille, Lille (FR); and Ecole Centrale de Marseille, Marseilles (FR)
PCT Filed Sep. 10, 2019, PCT No. PCT/EP2019/074142
§ 371(c)(1), (2) Date Mar. 19, 2021,
PCT Pub. No. WO2020/058043, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 1858545 (FR), filed on Sep. 20, 2018.
Prior Publication US 2021/0382290 A1, Dec. 9, 2021
Int. Cl. G02B 23/24 (2006.01); A61B 1/00 (2006.01); G02B 23/26 (2006.01)
CPC G02B 23/2469 (2013.01) [A61B 1/00167 (2013.01); A61B 1/00172 (2013.01); G02B 23/26 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A device for transporting and controlling light beams, comprising:
a light guide comprising a bundle of uncoupled single-mode optical fibers, each single-mode optical fiber being intended to receive an elementary light beam at a proximal end and to emit a light beam at a distal end, said bundle of single-mode optical fibers comprising, in operation, a minimum radius of curvature corresponding to a maximum curvature of the bundle of fibers;
an optical device for phase controlling, said device being arranged on the side of the proximal end of the light guide and comprising:
at least a first spatial light modulator suitable for applying a phase shift to each of the elementary beams;
a control unit for controlling the first spatial light modulator, said control unit being configured to apply a phase shift to each of the elementary beams so as to form, at the distal end of the light guide, an illumination beam with a predefined phase function,
and wherein said bundle of single-mode optical fibers is twisted, and comprises a twist period defined to preserve said phase function at the distal end of the light guide when the bundle of single-mode optical fibers is subjected to a curvature lower than said maximum curvature.