What is it about?

In this work, a physical justification is given for the technology for recording color 3D images in a transparent optical carrier based on a lithium fluoride crystal. This technology is based on the found possibilities of creating voxels of three basic colors: red, green and blue under the influence of laser radiation. The technology includes three stages of femtosecond laser irradiation and three stages of heat treatment of the optical medium.

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Why is it important?

Methods for recording monochromatic images with laser radiation in transparent media have been developed long ago. However, attempts to record full color images did not give good results. In our work, this problem was solved for the first time.


Previously, we were mainly engaged in pure (fundamental) studies of the interaction of intense laser radiation with transparent crystals and ceramices based on them. We have developed highly sensitive luminescent methods for studying the self-focusing and filamentation of laser radiation in such media, including alkali halide and alkaline earth compounds. The mechanisms of the formation of luminescent quantum systems (color centers) by laser radiation in such media were investigated, and their characteristics and properties were measured. Using media such as highly nonlinear volumetric photographic luminescent materials, we recorded spatial patterns of highly nonlinear interaction of light and matter. Experiments with such patterns allowed us to reveal the role of the anisotropy associated with the effective electron mass tensor and the third-order nonlinear susceptibility tensor in the efficiency of laser defect formation processes. We are satisfied that the accumulated scientific knowledge about the mechanisms of laser formation of luminescent centers and their properties allowed us to additionally solve a practical problem in the field of laser technologies. This solution consists in creating a recipe for recording color images inside transparent crystals or optical ceramices based on them.

Evgueni Martynovich
Irkutsk Branch of the Institute of Laser Physics of the SB RAS, Irkutsk, 664033, Russia

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This page is a summary of: Laser recording of color voxels in lithium fluoride, Optics & Laser Technology, November 2020, Elsevier, DOI: 10.1016/j.optlastec.2020.106430.
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