4 January 2019 Self-focusing of coherent light beams in photorefractive lithium niobate due to assistance of incoherent background
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Proceedings Volume 11024, Asia-Pacific Conference on Fundamental Problems of Opto- and Microelectronics 2017; 110240T (2019) https://doi.org/10.1117/12.2315171
Event: Asia-Pacific Conference on Fundamental Problems of Opto- and Microelectronics 2017, 2017, Taipei, Taiwan
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.
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A. Pustozerov, D. Okunev, and V. Shandarov "Self-focusing of coherent light beams in photorefractive lithium niobate due to assistance of incoherent background", Proc. SPIE 11024, Asia-Pacific Conference on Fundamental Problems of Opto- and Microelectronics 2017, 110240T (4 January 2019); doi: 10.1117/12.2315171; https://doi.org/10.1117/12.2315171
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