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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 3 — Feb. 10, 2014
  • pp: 2933–2947

GPU accelerated toolbox for real-time beam-shaping in multimode fibres

M. Plöschner, B. Straka, K. Dholakia, and T. Čižmár  »View Author Affiliations


Optics Express, Vol. 22, Issue 3, pp. 2933-2947 (2014)
http://dx.doi.org/10.1364/OE.22.002933


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Abstract

We present a GPU accelerated toolbox for shaping the light propagation through multimode fibre using a spatial light modulator (SLM). The light is modulated before being coupled to the proximal end of the fibre in order to achieve arbitrary light patterns at the distal end of the fibre. First, the toolbox optimises the acquisition time of the transformation matrix of the fibre by synchronous operation of CCD and SLM. Second, it uses the acquired transformation matrix retained within the GPU memory to design, in real-time, the desired holographic mask for on-the-fly modulation of the output light field. We demonstrate the functionality of the toolbox by acquiring the transformation matrix at the maximum refresh rate of the SLM - 204Hz, and using it to display an on-demand oriented cube, at the distal end of the fibre. The user-controlled orientation of the cube and the corresponding holographic mask are obtained in 20ms intervals. Deleterious interference effects between the neighbouring points are eliminated by incorporating an acousto-optic deflector (AOD) into the system. We remark that the usage of the toolbox is not limited to multimode fibres and can be readily used to acquire transformation matrix and implement beam-shaping in any other linear optical system.

© 2014 Optical Society of America

OCIS Codes
(060.2350) Fiber optics and optical communications : Fiber optics imaging
(090.1000) Holography : Aberration compensation
(090.1760) Holography : Computer holography

ToC Category:
Fiber Optics

History
Original Manuscript: November 29, 2013
Manuscript Accepted: December 19, 2013
Published: January 31, 2014

Virtual Issues
February 28, 2014 Spotlight on Optics

Citation
M. Plöschner, B. Straka, K. Dholakia, and T. Čižmár, "GPU accelerated toolbox for real-time beam-shaping in multimode fibres," Opt. Express 22, 2933-2947 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-3-2933


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