Shaping the light transmission through a multimode optical fibre: complex transformation analysis and applications in biophotonics.

We present a powerful approach towards full understanding of laser light propagation through multimode optical fibres and control of the light at the fibre output. Transmission of light within a multimode fibre introduces randomization of laser beam amplitude, phase and polarization. We discuss the importance of each of these factors and introduce an experimental geometry allowing full analysis of the light transmission through the multimode fibre and subsequent beam-shaping using a single spatial light modulator. We show that using this approach one can generate an arbitrary output optical field within the accessible field of view and range of spatial frequencies given by fibre core diameter and numerical aperture, respectively, that contains over 80% of the total available power. We also show that this technology has applications in biophotonics. As an example, we demonstrate the manipulation of colloidal microparticles.

[1]  A. Mosk,et al.  Phase control algorithms for focusing light through turbid media , 2007, 0710.3295.

[2]  Monika Ritsch-Marte,et al.  Optical mirror trap with a large field of view. , 2009, Optics express.

[3]  B Y Gu,et al.  Gerchberg-Saxton and Yang-Gu algorithms for phase retrieval in a nonunitary transform system: a comparison. , 1994, Applied optics.

[4]  Giancarlo Ruocco,et al.  Computer generation of optimal holograms for optical trap arrays. , 2007, Optics express.

[5]  Tomáš Čižmár,et al.  Shaping the future of manipulation , 2011 .

[6]  E. G. van Putten,et al.  Demixing light paths inside disordered metamaterials. , 2008, Optics express.

[7]  A. Ashkin Acceleration and trapping of particles by radiation pressure , 1970 .

[8]  K. Dholakia,et al.  Tunable Bessel light modes: engineering the axial propagation. , 2009, Optics express.

[9]  G. Bouwmans,et al.  Very high numerical aperture fibers , 2004, IEEE Photonics Technology Letters.

[10]  R. Gerchberg A practical algorithm for the determination of phase from image and diffraction plane pictures , 1972 .

[11]  Peter John Rodrigo,et al.  Real-time three-dimensional optical micromanipulation of multiple particles and living cells. , 2004, Optics letters.

[12]  S. Chu,et al.  Observation of a single-beam gradient force optical trap for dielectric particles. , 1986, Optics letters.

[13]  K. Dholakia,et al.  In situ wavefront correction and its application to micromanipulation , 2010 .

[14]  Carl Paterson,et al.  Adaptive phase compensation for ultracompact laser scanning endomicroscopy. , 2011, Optics letters.

[15]  Francesco De Angelis,et al.  Miniaturized all-fibre probe for three-dimensional optical trapping and manipulation , 2007 .

[16]  Silvio Bianchi,et al.  Hologram transmission through multi-mode optical fibers. , 2011, Optics express.

[17]  M. Prentiss,et al.  Demonstration of a fiber-optical light-force trap. , 1993, Optics letters.

[18]  J P Huignard,et al.  Phase and amplitude control of a multimode LMA fiber beam by use of digital holography. , 2009, Optics express.

[19]  A. Mosk,et al.  Universal optimal transmission of light through disordered materials. , 2008, Physical review letters.

[20]  Oto Brzobohatý,et al.  The holographic optical micro-manipulation system based on counter-propagating beams , 2010 .

[21]  J. Käs,et al.  The optical stretcher: a novel laser tool to micromanipulate cells. , 2001, Biophysical journal.

[22]  A. Mosk,et al.  Focusing coherent light through opaque strongly scattering media. , 2007, Optics letters.