Random Scattering and Alternating Projection Optimization for Active Phase Control of a Laser Beam Array

A fraction of a laser beam array, whose unknown piston phase relationships must be set to prescribed values, is launched into a scattering media with random transmission. The resulting output speckle pattern is sampled by an array of photodiodes measuring the local light intensity. The data feed an...

Full description

Saved in:
Bibliographic Details
Published in:IEEE photonics journal 2019-08, Vol.11 (4), p.1-9
Main Authors: Saucourt, Jeremy, Armand, Paul, Kermene, Vincent, Desfarges-Berthelemot, Agnes, Barthelemy, Alain
Format: Article
Language:English
Subjects:
Active control
Arrays
Laser arrays
Laser beam combining
Laser beams
Locking
Luminous intensity
Measurement by laser beam
Optics
Optimization
Phase control
Phase distribution
Phase modulation
Phase relationships
Phased arrays
Photodiodes
Physics
Scattering
Speckle patterns
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A fraction of a laser beam array, whose unknown piston phase relationships must be set to prescribed values, is launched into a scattering media with random transmission. The resulting output speckle pattern is sampled by an array of photodiodes measuring the local light intensity. The data feed an innovative optimization process, which controls a phase modulator array. Few iterations of the optonumeric loop lead to efficient and fast phase locking on any desired piston phase distribution.
ISSN:1943-0655
1943-0655
1943-0647
DOI:10.1109/JPHOT.2019.2926859