Principles of creation of a tunable terahertz laser with lasing at a difference frequency in a nonlinear ZnGeP<sub>2</sub> optical crystal

A. I. Gribenyukov; V. V. Demin; I. G. Polovtsev; N. N. Yudin

doi:10.1364/JOT.85.000322

Journal of Optical Technology
Vol. 85,
Issue 6,
pp. 322-325
(2018)
•https://doi.org/10.1364/JOT.85.000322

Principles of creation of a tunable terahertz laser with lasing at a difference frequency in a nonlinear ZnGeP₂ optical crystal

A. I. Gribenyukov, V. V. Demin, I. G. Polovtsev, and N. N. Yudin

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A. I. Gribenyukov, V. V. Demin, I. G. Polovtsev, and N. N. Yudin, "Principles of creation of a tunable terahertz laser with lasing at a difference frequency in a nonlinear ZnGeP₂ optical crystal," J. Opt. Technol. 85, 322-325 (2018)

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Abstract

An optical system for conversion of mid-infrared laser radiation into terahertz radiation is proposed. The proposed system uses lasing with a wavelength of 2 μm in a holmium:yttrium–aluminum–garnet (Ho:YAG) laser in the first stage of the system, conversion of the Ho:YAG laser radiation in two parametric light sources based on ZnGeP₂ single-crystals with fixed and tunable wavelengths in the range of 3–4.5 μm in the second stage, and conversion of the radiation of these two parametric sources in the 3–4.5-μm region into the terahertz range by generating difference-frequency radiation in the nonlinear ZnGeP₂ optical crystal in the third stage. We estimate the characteristics of the output terahertz radiation.

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Journal of Optical Technology