Wavefront shaping for optimized many-mode Kerr beam self-cleaning in graded-index multimode fiber.

We report experimental results, showing that the Kerr beam self-cleaning of many low-order modes in a graded-index multimode fiber can be controlled thanks to optimized wavefront shaping of the coherent excitation beam. Adaptive profiling of the transverse input phase was utilized for channeling the launched power towards a specific low-order fiber mode, by exploiting nonlinear coupling among all guided modes. Experiments were carried out with 7 ps pulses at 1064 nm injected in a five meters long multimode fiber operating in the normal dispersion regime. Optimized Kerr beam self-cleaning of five different LP modes is reported, with a power threshold that increases with the mode order.

[1]  Sylvain Gigan,et al.  Image transmission through an opaque material. , 2010, Nature communications.

[2]  K. Wagner,et al.  Adaptive wavefront shaping for controlling nonlinear multimode interactions in optical fibres , 2018 .

[3]  A Tonello,et al.  Spatiotemporal characterization of supercontinuum extending from the visible to the mid-infrared in a multimode graded-index optical fiber. , 2016, Optics letters.

[4]  W. Choi,et al.  Maximal energy transport through disordered media with the implementation of transmission eigenchannels , 2012, Nature Photonics.

[5]  Dominique Pagnoux,et al.  Shaping the light amplified in a multimode fiber , 2016, Light: Science & Applications.

[6]  Logan G. Wright,et al.  Visible supercontinuum generation in a graded index multimode fiber pumped at 1064  nm. , 2016, Optics letters.

[7]  Yaron Silberberg,et al.  Focusing light by wavefront shaping through disorder and nonlinearity , 2016, 1607.08105.

[8]  K. Dholakia,et al.  Exploiting multimode waveguides for pure fibre-based imaging , 2012, Nature Communications.

[9]  Logan G. Wright,et al.  Kerr self-cleaning of femtosecond-pulsed beams in graded-index multimode fiber. , 2016, Optics letters.

[10]  O. Katz,et al.  Focusing and compression of ultrashort pulses through scattering media , 2010, 1012.0413.

[11]  F. Wise,et al.  Optical solitons in graded-index multimode fibres , 2013, Nature Communications.

[12]  Frank W. Wise,et al.  Versatile supercontinuum generation in parabolic multimode optical fibers , 2016, 2016 Conference on Lasers and Electro-Optics (CLEO).

[13]  A. Mosk,et al.  Control of light transmission through opaque scattering media in space and time. , 2010, Physical review letters.

[14]  I. Vellekoop.  Feedback-based wavefront shaping. , 2015, Optics express.

[15]  S. Gigan,et al.  Light fields in complex media: Mesoscopic scattering meets wave control , 2017, 1702.05395.

[16]  Jochen Schröder,et al.  110x110 optical mode transfer matrix inversion. , 2014, Optics express.

[17]  Vincent Couderc,et al.  Observation of Geometric Parametric Instability Induced by the Periodic Spatial Self-Imaging of Multimode Waves. , 2016, Physical review letters.

[18]  Logan G. Wright,et al.  Controllable spatiotemporal nonlinear effects in multimode fibres , 2015, Nature Photonics.

[19]  Yong Xu,et al.  Adaptive control of waveguide modes in a two-mode-fiber. , 2014, Optics express.

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

[21]  S. Popoff,et al.  Measuring the transmission matrix in optics: an approach to the study and control of light propagation in disordered media. , 2009, Physical review letters.

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

[23]  Vincent Couderc,et al.  Spatial beam self-cleaning in multimode fibres , 2016, Nature Photonics.

[24]  Ioannis N. Papadopoulos,et al.  Digital confocal microscopy through a multimode fiber. , 2015, Optics express.