20 November 2002 Optical channeling and diffraction in the photorefractive crystals and chalcogenide films
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We have studied holographic grating recordings in Fe-doped photorefractive crystals LiNbO3 (LN), in doped As-S-Se chalcogenide glassy semiconductors (CGS), and in CGS based photothermoplastic structures (PTPS). Transmission gratings in a-cut crystals of LN were efficient enough to demonstrate the effect of optical channeling. Volume gratings recorded in LN crystals may be used as a parallel array of the planar waveguides. For CGS, slanted grating geometry was tested, with the goal being the creation of asymmetric blazed gratings. Asymmetry of non-Bragg diffraction orders was observed. For the first time, reflection volume grating were recorded in 2μm thick CGS by green solid-state laser. We have also tested the possibility of single beam contact recording in LN, using CGS with recorded grating as beam-splitter attached to the surface of LN.
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Nickolai V. Kukhtarev, Nickolai V. Kukhtarev, Tatiana V. Kukhtareva, Tatiana V. Kukhtareva, Vernessa M. Edwards, Vernessa M. Edwards, Sergey S. Sarkisov, Sergey S. Sarkisov, Michael J. Curley, Michael J. Curley, Ja Ching Wang, Ja Ching Wang, Vasile K. Rotaru, Vasile K. Rotaru, Oleg Korshack, Oleg Korshack, Galina Dragalina, Galina Dragalina, Stephan V. Robu, Stephan V. Robu, } "Optical channeling and diffraction in the photorefractive crystals and chalcogenide films", Proc. SPIE 4803, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VIII, (20 November 2002); doi: 10.1117/12.452625; https://doi.org/10.1117/12.452625

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