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19
A LT'2 2 LS-1-14
LASER SYSTEMS AND MATERIALS
Light Frequency Converters and Tunable Diffractive Elements Based on Periodically Poled Ferroelectric Crystals and Thin Films
V. Shur1, A. Akhmatkhanov1, A. Esin1, M. Chuvakova1, B. Slautin1, V. Pavelyev2, D. Kolker3, A. Boyko3
1- Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, Russia 2- Image Processing Systems Institute of the Russian Academy of Science, Samara, Russia 3- Novosibirsk State University, Novosibirsk, Russia E-mail: vladimir.shur@urfu.ru
We present the achievements in creation of the periodical domain structures in single crystals of lithium niobate (LN), lithium tantalate (LT) and potassium titanyl phosphate (KTP) families and thin films of LN on isolator (LNOI) for realization of the second harmonic generation (SHG) and optical parametric oscillation (OPO) with record efficiency based on quasi-phase-matching. Various types of LN based tunable diffraction optical elements (DOE) with tailored stable domain structure have been created. The complex study of the domain structure evolution using complementary high-resolution domain imaging methods allows to improve essentially the periodical poling technique.
The detail study of the domain structure evolution and periodical poling have been carried out in thin single-crystalline ion sliced films of LN on SiO2 isolation layer (LNOI) by conductive tip of the scanning probe microscope [1,2]. The stable domain structures with period less than 200 nm have been created [3,4].
The creation of tunable mid-infrared pulsed optical parametric amplifier (OPA) based on periodically poled LN with fan-out domain structure pumped by 1.053 mm laser and tunable continuous-wave injection seeding have been demonstrated [5]. It was shown that injection seeding leads to four times decrease of the linewidth of output signal wave. The fan-out periodical domain structures allowed to obtain wide OPA tuning range from 2.5 to 4.5 mm [5]. The periodical domain structure in 1-mm-thick KTP single crystals with period 37.97 mm allowed to obtain OPO generation at wavelength 2.4 mm with average power 25 mW for 1300 mW pump.
The opposite values of the linear electrooptic effect for neighboring ferroelectric domains allows to create in ferro-electrics the electrical field controlled DOEs [7]. By creation of tailored stable domain structures in LN single crystals we have created DOEs allowing to obtain Hermite-Gaussian mode (1,0) [7] and mode with orbital angular momentum from Gaussian beam. The possibility of continuous tuning of diffraction efficiency has been demonstrated. It was shown that response time of tunable DOE is less than 200 ns.
The reported study was funded by RFBR and Government of Sverdlovsk region, project № 20-42-660025.
[1] B.N. Slautin, A.P. Turygin, E.A. Pashnina, A.S. Slautina, D.S. Chezganov, and V.Ya. Shur, Evolution of nanodomains and formation of self-organized structures during local switching in X-cut LNOI, Crystals, 12, 659 (2022).
[2] B.N. Slautin, A.P. Turygin, E.D. Greshnyakov, A.R. Akhmatkhanov, H. Zhu, and V.Ya. Shur, Domain structure formation by local switching in the ion sliced lithium niobate thin films, Appl. Phys. Lett., 116, 152904 (2020).
[3] B.N. Slautin, H. Zhu, and V.Ya. Shur, Submicron periodical poling in Z-cut lithium niobate thin films, Ferroelectrics, 576, 119128 (2021).
[4] B.N. Slautin, H. Zhu, and V.Ya. Shur, Submicron periodical poling by local switching in the ion sliced lithium niobate thin films with dielectric layer, Ceramics International, 47, 32900-32904 (2021).
[5] E. Erushin, B. Nyushkov, A. Ivanenko, A. Akhmathanov, V. Shur, A. Boyko, N. Kostyukova, and D. Kolker, Tunable injection-seeded fan-out-PPLN optical parametric oscillator for high-sensitivity gas detection, Laser Phys. Lett. 18, 116201 (2021).
[6] O.L. Antipov, D.B. Kolker, A.A. Dobrynin, Yu.A. Getmanovskiy, V.V. Sharkov, M.A. Chuvakova, A.R. Akhmathanov, V.Ya. Shur, I.A. Shestakova, and S.V. Larin, Mid-infrared optical parametric oscillation and second harmonic generation of repetitively-pulsed radiation of a fiber-laser pumped Tm3+:YAP laser in a fan-out periodically poled MgO:LiNbO3 crystal, Quantum Electronics, 52, 254-261 (2022).
[7] A.A. Esin, A.R. Akhmatkhanov, V.S. Pavelyev, and V.Y. Shur. Tunable LiNbO3-based diffraction optical element for the control of transverse modes of the laser beam. Computer Optics, 45, 222-226 (2021).
