Phase correction for a distorted orbital angular momentum beam using a Zernike polynomials-based stochastic-parallel-gradient-descent algorithm

Xie, G. et al. (2015) Phase correction for a distorted orbital angular momentum beam using a Zernike polynomials-based stochastic-parallel-gradient-descent algorithm. Optics Letters, 40(7), pp. 1197-1200. (doi:10.1364/OL.40.001197)

Full text not currently available from Enlighten.

Abstract

A stochastic-parallel-gradient-descent algorithm (SPGD) based on Zernike polynomials is proposed to generate the phase correction pattern for a distorted orbital angular momentum (OAM) beam. The Zernike-polynomial coeffi- cients for the correction pattern are obtained by monitoring the intensity profile of the distorted OAM beam through an iteration-based feedback loop. We implement this scheme and experimentally show that the proposed approach improves the quality of the turbulence-distorted OAM beam. Moreover, we apply phase correction patterns derived from a probe OAM beam through emulated turbulence to correct other OAM beams transmitted through the same turbulence. Our experimental results show that the patterns derived this way simultaneously correct multiple OAM beams propagating through the same turbulence, and the crosstalk among these modes is reduced by more than 5 dB.

Item Type:Articles (Letter)
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Lavery, Dr Martin and Boyd, Professor Robert
Authors: Xie, G., Ren, Y., Huang, H., Lavery, M., Ahmed, N., Yan, Y., Bao, C., Li, L., Zhao, Z., Cao, Y., Willner, M., Tur, M., Dolinar, S. J., Boyd, R., Shapiro, J. H., and Willner, A. E.
Subjects:Q Science > Q Science (General)
Q Science > QC Physics
T Technology > T Technology (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Optics Letters
Publisher:Optical Society of America
ISSN:0146-9592
ISSN (Online):1539-4794

University Staff: Request a correction | Enlighten Editors: Update this record

Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
UNSPECIFIEDUNSPECIFIEDToolkit for High Dimensional CommunicationsDr Martin LaveryRoyal Academy of EngineeringUNSPECIFIEDUNSPECIFIED