2019/10/04 by Santanu Konwar, Konwar, Santanu, Bosanta R. Boruah +2
Engineering · Physics and Astronomy · #Adaptive optics and wavefront sensing #Advanced Optical Sensing Technologies #Applied Physics (physics.app-ph) #FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Optical Wireless Communication Technologies #Optics (physics.optics) #physics.app-ph #physics.ins-det #physics.optics
paper · pdf · doi:10.48550/arxiv.1910.02019
arxiv created 2019/10/04 · openalex publication_date 2019/10/04 · arxiv updated 2019/10/07 · openalex created_date 2019/10/10 · openalex updated_date 2026/07/28
In this paper we propose and experimentally demonstrate information transfer through free-space using a laser beam encoded with multiple orthogonal aberration modes in its phase profile. We use Zernike polynomials which forms a complete set of basis functions to represent the aberration modes. The user information is encoded as amplitudes of multiple Zernike modes whose linear combination is used to define the wavefront of the laser beam in the transmission station. It therefore requires a single phase modulating device since the multiplexing is done digitally providing flexibility over the number and type of modes used. The receiving station uses a wavefront sensor that gives a direct measure of all the aberration modes from a single measurement which is decoded to retrieve the user information. The transmission mechanism enables the use of multiple modes and multiple strengths of each mode to encode the user information and external perturbation compensation, utilizing the completeness of the orthogonal modes.