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

被引：0

作者：

Pustozerov, A. ^{[1
]}

Okunev, D. ^{[1
]}

Shandarov, V. ^{[1
]}

机构：

[1] Tomsk State Univ Control Syst & Radioelect, 40 Lenin Prosp, Tomsk, Russia

来源：

ASIA-PACIFIC CONFERENCE ON FUNDAMENTAL PROBLEMS OF OPTO- AND MICROELECTRONICS 2017 | 2019年 / 11024卷

基金：

俄罗斯基础研究基金会;

关键词：

Lithium niobate; photorefractive effect; photovoltaic current; incoherent background; two-dimensional optical waveguide; SPATIAL SOLITONS; WAVE-GUIDES;

D O I：

10.1117/12.2315171

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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 mu m 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.

引用

页数：5

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