10 March 1998 Waveguide-hologram-based controllable unidirectional beamsplitter
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Abstract
New optical device splitting the monochromatic light beam into 16 parallel light beams of uniform intensity is demonstrated. The beamsplitter input and output elements are formed as waveguide holograms in chalcogenide layers. The unidirectional coupled out radiation is ensured by the highly reflective mirror which is mounted on the piezocorrector in parallel with the waveguide surface. The mirror sums the light beams emitted into the half-space above the waveguide and through the substrate. By a small change in piezocorrector voltage one can regular the difference in optical paths of the interference light beams and alter the coupled out beam intensities from zero to maximum. The beamsplitter allows to set and stabilize the intensity levels of the coupled out beams. The demonstrated device can be used to design adaptive optic systems and 3D integrated optics. Specifically, on the basis of this beamsplitter it is possible to obtain a matrix source of controlled light beams, which combines functions of beamsplitter and spatial light modulator.
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Nikolai N. Kamenev, Nikolai N. Kamenev, Valeriy I. Nalivaiko, Valeriy I. Nalivaiko, } "Waveguide-hologram-based controllable unidirectional beamsplitter", Proc. SPIE 3348, Optical Information Science and Technology (OIST97): Computer and Holographic Optics and Image Processing, (10 March 1998); doi: 10.1117/12.302477; https://doi.org/10.1117/12.302477
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