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Proceedings Paper

Self-focusing of coherent light beams in photorefractive lithium niobate due to assistance of incoherent background
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Paper Abstract

Influence of incoherent background on diffraction divergence of narrow light beams of He-Ne laser with wavelength of 633 nm due to refractive index changes of Fe-doped lithium niobate sample is experimentally studied. Incoherent background is produced by light-emitting diodes (LED´s) of different average wavelengths and laser diode emitting in blue region of visible. It has been experimentally demonstrated that nonlinear diffraction of coherent red beams of He-Ne laser with diameters on full width of half maximum (FWHM) near to 15 - 20 μm may be totally compensated by means of assistance of incoherent background with shorter average wavelengths 455 – 465 nm and even much lower intensity compared with that for coherent beam.

Paper Details

Date Published: 4 January 2019
PDF: 5 pages
Proc. SPIE 11024, Asia-Pacific Conference on Fundamental Problems of Opto- and Microelectronics 2017, 110240T (4 January 2019); doi: 10.1117/12.2315171
Show Author Affiliations
A. Pustozerov, Tomsk State Univ. of Control Systems and Radioelectronics (Russian Federation)
D. Okunev, Tomsk State Univ. of Control Systems and Radioelectronics (Russian Federation)
V. Shandarov, Tomsk State Univ. of Control Systems and Radioelectronics (Russian Federation)


Published in SPIE Proceedings Vol. 11024:
Asia-Pacific Conference on Fundamental Problems of Opto- and Microelectronics 2017
Yuri N. Kulchin; Roman V. Romashko; Jyh-Chiang Jiang, Editor(s)

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