Repetitively pulsed TEA CO<sub>2</sub>laser and its application for second harmonic generation in ZnGeP<sub>2</sub>crystal

Koval'chuk, L V; Grezev, A N; Niz'ev, Vladimir G; Yakunin, Vladimir P.; Mezhevov, V S; Goryachkin, D. А.; Сергеев, В. В.; Kalintsev, A. G.

doi:10.1070/qe2015v045n10abeh015648

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…It has a unique set of optical and nonlinear optical properties, such as wide transmission range (0.7-12 μm), large nonlinear coefficient (d 36 = 75 pm=V), high thermal conductivity (360 mW • cm −1 • K −1 ), an applicable laser-induced damage threshold (30 GW=cm 2 ), and suitable birefringence (0.040-0.042) [4][5][6] . As an essential laser frequency conversion crystal, ZGP can be widely used for the generation of infrared optical parametric oscillation (OPO), optical parametric amplifier (OPA), frequency mixing (FM), and second-harmonic generation (SHG) [7][8][9][10] . Pumped at 2 μm, the ZGP OPO can realize continuously tunable laser output in the range of 3-8 μm with a conversion efficiency of more than 50% [11] .…”

Section: Introductionmentioning

confidence: 99%

Atomic structures and carrier dynamics of defects in a ZnGeP2 crystal

et al. 2023

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ZnGeP 2 (ZGP) crystals have attracted tremendous attention for their applications as frequency conversion devices. Nevertheless, the existence of native point defects, including at the surface and in the bulk, lowers their laser-induced damage threshold by increasing their absorption and forming starting points of the damage, limiting their applications. Here, native point defects in a ZGP crystal are fully studied by the combination of high angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and optical measurements. The atomic structures of the native point defects of the Zn vacancy, P vacancy, and Ge-Zn antisite were directly obtained through an HAADF-STEM, and proved by photoluminescence (PL) spectra at 77 K. The carrier dynamics of these defects are further studied by ultrafast pump-probe spectroscopy, and the decay lifetimes of 180.49, 346.73, and 322.82 ps are attributed to the donor V p + → valence band maximum (VBM) recombination, donor Ge Zn + → VBM recombination, and donor-acceptor pair recombination of V p + → V Zn − , respectively, which further confirms the assignment of the electron transitions. The diagrams for the energy bands and excited electron dynamics are established based on these ultrahigh spatial and temporal results. Our work is helpful for understanding the interaction mechanism between a ZGP crystal and ultrafast laser, doing good to the ZGP crystal growth and device fabrication.

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Section: Introductionmentioning

confidence: 99%

Atomic structures and carrier dynamics of defects in a ZnGeP2 crystal

et al. 2023

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“…The problem of the practical implementation of DIAL today is the lack of sufficiently high-power highly monochromatic laser sources in the near/mid-IR, which allow smooth and/or discrete tuning of the radiation frequency. One of the approaches to generation of tunable laser radiation in these regions is the use of parametric laser frequency converters based on nonlinear optical crystals, which are actively applied to generation of laser radiation [5] and harmonics of different orders [6], for optical rectification, frequency mixing [7], etc. Laser systems based on them are characterized by highly stable radiation characteristics, small sizes, and a capability of quick changing the laser configuration (variability of components) and, which is extremely important, a possibility of smooth tuning of the radiation wavelength in a wide spectral range [8].…”

Section: Introductionmentioning

confidence: 99%

Near/Mid IR Differential Absorption OPO Lidar System for Gas Analysis of the Atmosphere

Romanovskii¹,

Sadovnikov²,

Kharchenko³

et al. 2018

Preprint

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Data on the atmospheric gas concentrations can be received with high efficiency and on a large spatial scale only from remote laser sounding instruments. The remote laser techniques with the use of lidars are widely used in the study of the atmosphere and control of its state. The aims of this work are the design and test in numerical and field experiments of a DIAL OPO lidar system based on KTA and KTP crystals for gas analysis of the atmosphere. Lidar measurements of atmospheric gases in the near/mid infrared region have been numerically simulated. The differential absorption lidar system based on optical parametric oscillators with nonlinear KTA and KTP crystals which allow laser radiation tuning both in the near and in the middle IR spectral region is described; it allows tuning laser radiation in the near/mid-IR wavelength regions. Lidar echo signals have been experimentally recorded in the 1.8–2.5 and 3–4 m wavelength ranges. The results of H2O and CO2 profile measurements along the surface sounding path are presented.

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Development of a dielectric corona pre-ionized TEA CO2 laser with CO2-rich gas mixture suitable for second harmonic generation

Pezh

2022

Optics Communications

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Repetitively pulsed TEA CO₂laser and its application for second harmonic generation in ZnGeP₂crystal

Cited by 5 publications

References 12 publications

Atomic structures and carrier dynamics of defects in a ZnGeP2 crystal

Atomic structures and carrier dynamics of defects in a ZnGeP2 crystal

Near/Mid IR Differential Absorption OPO Lidar System for Gas Analysis of the Atmosphere

Development of a dielectric corona pre-ionized TEA CO2 laser with CO2-rich gas mixture suitable for second harmonic generation

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Repetitively pulsed TEA CO2laser and its application for second harmonic generation in ZnGeP2crystal

Cited by 5 publications

References 12 publications

Atomic structures and carrier dynamics of defects in a ZnGeP2 crystal

Atomic structures and carrier dynamics of defects in a ZnGeP2 crystal

Near/Mid IR Differential Absorption OPO Lidar System for Gas Analysis of the Atmosphere

Development of a dielectric corona pre-ionized TEA CO2 laser with CO2-rich gas mixture suitable for second harmonic generation

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Repetitively pulsed TEA CO₂laser and its application for second harmonic generation in ZnGeP₂crystal