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)
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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) |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Lavery, Professor 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 |
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