Self-imaging, self-healing beams generated by photorefractive volume holography
Self-imaging beams consisting of three-dimensional intensity voids are generated via photorefractive volume holography. Reconstruction of a volume hologram recorded at 594 nm is performed with a Bessel readout beam. The holographic output is similar in appearance to a Bessel beam, with the central spot oscillating between maximum and zero intensity over a propagation distance of 10 to 55 cm. The oscillation period for the on-axis intensity is 30 cm. The reconstruction is capable of self-healing, with a fully recovered central core after the beam propagates 40 cm. Dual-wavelength reconstruction at 632.8 nm produces an output beam with similar self-imaging and self-healing properties. A theoretical framework based on the interference of a plane wave and a Bessel beam simultaneously reconstructed from a volume hologram is able to describe our experimental results.
Jonathan P. Manigo and Raphael A. A. Guerrero "Self-imaging, self-healing beams generated by photorefractive volume holography," Optical Engineering 54(10), 104113 (28 October 2015). https://doi.org/10.1117/1.OE.54.10.104113