UDC 535.32
CSCSTI 29.33
Russian Classification of Professions by Education 03.03.02
Russian Library and Bibliographic Classification 223
Russian Trade and Bibliographic Classification 6135
BISAC TEC019000 Lasers & Photonics
Specific possibilities of controlling the sign of a biaxial negative nonlinear LBO crystal by changing its operating temperature and creating original radiation sources operating in the long-wave part of the IR and/or THz spectral range using nonlinear crystal optics methods have been discovered for the first time. Sign changes lead to the possibility of implementing new, corresponding types of parametric frequency conversion of pump laser radiation. In addition, the frequency conversion process can be optimized by adjusting the temperature to achieve maximum efficiency. Features of frequency conversion of pump radiation in pure and sulfur-doped GaSe crystals are considered.
nonlinear crystal, nonlinear crystal sign, parametric frequency conversion, terahertz range.
1. Dmitriev V.G., Gurzadyan G.G., Nikogosyan D.N. Handbook of nonlinear optical crystals. – Springer, 1999. – 414 p.
2. Primenenie nelineynogo kristalla triborata litiya (LBO) dlya fazosoglasovannoy generacii izlucheniya teragercovogo diapazona: Pat. 2617561. Rossiya, MKI6, G 02 F 1/35. Andreev Yu.M., Koh A.E., Koh K.A., Kononova N.G., Lanskiy G.V., Svetlichnyy V.A.; Tomsk. gos. un-t, Inst. geol. i min. SO RAN № 2015148804; Zayavl. 13.11.2015. Opubl. 25.04.2017. Byul. № 12.
3. Andreev Yu.M., Kokh A.E., Kokh K.A., Lanskii G.V., Litvinenko K., Mamrashev A.A., Molloy J.F., Murdin B., Naftaly M., Nikolaev N.A., Svetlichnyi V.A. Observation of a different birefringence order at optical and THz frequencies in LBO crystal // Opt. Mater. 2017. V. 66. P. 94-97. DOI:https://doi.org/10.1016/j.optmat.2017.01.031
4. Ezhov D.M., Lubenko D.M., Mamrashev A.A., Andreev Y.M. Temperature dependence of refractive indices of nonlinear LiB3O5 crystals in the THz range // Atmospheric and Oceanic Optics. 2022. V. 35. P. 171-173. DOI:https://doi.org/10.1134/S1024856023010050.
5. Vybornov P., Filatov N. High-accuracy uncooled bolometer system with a wide dynamic range // IEEE Sensors J. 2023. V. 23, iss. 20. P. 24247–24253. DOI:https://doi.org/10.1109/JSEN.2023.3312496.
6. Shi W., Ding Y.J., Fernelius N., Vodopyanov K. Efficient, tunable and coherent 0.18-5.27 THz source based on GaSe crystal // Optics Letters. 2002. V. 27, iss. 16. P. 1454–1456. DOI:https://doi.org/10.1364/OL.28.000136.
7. Mei J., Zhong K., Wang M., Liu Y., Xu D., Shi W., Wang Y., Yao J., Norwood R. A., Eyghambarian N. P. Widely-tunable high-repetition-rate terahertz generation in GaSe with a compact dual-wavelength KTP OPO around 2 μm // Optics Express. 2016. V. 24, iss. 20. P. 23368–23375. DOI:https://doi.org/10.1364/OE.24.023368.
8. Kokh A., Kononova N., Mennerat G., Villeval Ph., Durst S., Lupinski D., Vlezko V., Kokh K. Growth of high quality large size LBO crystals for high energy second harmonic generation // Journal of Crystal Growth. 2010. V. 312, iss. 10. P.1774–1778. DOI:https://doi.org/10.1016/j.jcrysgro.2010.02.023.
