Β-BBO, LBO, AND KTP NONLINEAR CRYSTALS AS A SOURCE OF THE MILLIMETER-WAVES RADIATION | Izvestiya vuzov. Fizika. 2020. № 6. DOI: 10.17223/00213411/63/6/113

Β-BBO, LBO, AND KTP NONLINEAR CRYSTALS AS A SOURCE OF THE MILLIMETER-WAVES RADIATION

We present the refractive indices and absorption coefficients of nonlinear-optical crystals β-BBO, LBO, and KTP measured in the range of 0.5-3 mm at temperatures of 298 and 78 K. The absorption coefficients of all crystals at 1 mm do not exceed 3.5 cm^-1 and fall with cooling. The anisotropy of the absorption coefficients of crystals increases significantly with a decrease in the wavelength (<1 mm), while at wavelengths >2 mm, it almost disappears. The absolute values of the absorption coefficients fall with the cooling to a level below 0.2 cm^-1. Based on measured refractive indices, a numerical simulation of the collinear phase-matching curves was carried out. We demonstrate the theoretical possibility of IR laser radiation (1.064 mm) conversion into the millimeter-waves range.

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Keywords

миллиметровые волны, нелинейные кристаллы, показатель преломления, коэффициент поглощения, генерация разностных частот, millimeter waves, nonlinear crystals, refractive index, absorption coefficient, difference frequencies generation

Authors

Name	Organization	E-mail
Nikolaev N.A.	Institute of Automation and Electrometry SB RAS; Institute of Laser Physics SB RAS	Nazar@iae.nsk.su
Lanskii G.V.	Institute for Monitoring of Climatic and Ecological Systems SB RAS	lansky@yandex.ru
Andreev Yu.M.	Institute for Monitoring of Climatic and Ecological Systems SB RAS; Institute of High Current Electronics SB RAS; National Research Tomsk State University	yuandreev@yandex.ru
Ezhov D.M.	National Research Tomsk State University	ezhov_dm@mail.ru
Krekov M.G.	National Research Tomsk State University	mikhailkrekov@gmail.com
Lisenko A.A.	Institute of Atmospheric Optics V.E. Zueva SB RAS	Lisenko@iao.ru

Всего: 6

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