Visualization and Characterization of Pre-breakdown Processes in the Volume of a ZnGeP2 Single Crystal During Parametric Generation of Radiation in the Wavelength Range of 3.5–5 μm when Pumped by Ho:YAG Laser Radiation

Yudin, N. N.; Vlasov, Denis; Антипов, О.Л.; Gribenyukov, A. I.; Zinoviev, Mikhail; Podzyvalov, S. N.; Slyunko, Elena; Yudin, N. A.; Kulesh, Maxim; Kuznetsov, V. S.; Dyomin, Victor

doi:10.1007/s11182-023-02881-9

Cited by 1 publication

(5 citation statements)

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“…A transparent nonlinear ZGP crystal (produced by LOC) with linear dimensions of 20 × 6 × 6 mm 3 cut at angles θ ≈ 54.5 • and ϕ ≈ 0 • was used to examine the effect of the pre-damage phenomena on ZGP OPO operation [69]. The absorption of radiation at a wavelength of 2.097 µm of the sample was 0.029 cm −1 .…”

Section: Effect Of Pre-damage Phenomena On Zgp Opo Operationmentioning

confidence: 99%

“…Through the side polished surfaces of Figure 15. Scheme of the ZGP OPO setup with Ho 3+ :YAG laser pumping: Ho 3+ :YAG laser, OI is the optical isolator, L is the lens, M1 is the input mirror of the OPO cavity, M2 is the output mirror of the OPO cavity, ZGP is the single crystal, LD is the laser diode, O is an objective, and IM is a power meter (adapted from [69]).…”

Section: Effect Of Pre-damage Phenomena On Zgp Opo Operationmentioning

confidence: 99%

“…At a power of more than 1.2 J/cm 2, a damaged track inside the ZGP element was registered. Restored image of the ZGP crystal taken with a holographic camera when laser radiation of different powers was applied to the nonlinear optical crystal ZGP (adapted from [69]).…”

Section: Effect Of Pre-damage Phenomena On Zgp Opo Operationmentioning

confidence: 99%

“…Figure17. Dependence of the OPO efficiency relative to the absorbed pump power on the pumping PRR (adapted from[69]). …”

mentioning

confidence: 99%

“…Figure 20.Restored image of the ZGP crystal taken with a holographic camera when laser radiation of different powers was applied to the nonlinear optical crystal ZGP (adapted from[69]). …”

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confidence: 99%

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Physical and Technological Aspects of Laser-Induced Damage of ZGP Single Crystals under Periodically Pulsed Laser Irradiation at 2.1 μm

Yudin,

Dyomin,

Gribenyukov

et al. 2023

Photonics

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The nonlinear properties of zinc germanium diphosphide (ZGP) crystals enable their applications in powerful mid-IR optical parametric oscillators and second-harmonic generators. This paper summarizes the mechanisms of the laser-induced damage (LID) of high-purity ZGP crystals under periodically pulsed nanosecond irradiation by a Ho3+:YAG laser at 2.1 μm. The ZGP samples were manufactured by “LOC” Ent., Tomsk, Russia, or the Harbin Institute of Technology, China. The impact of processing techniques and the post-growing methods for polishing and anti-reflective coatings on the LID threshold are discussed. The importance of the defect structure of the crystal lattice and the parameters of transparent coatings for increasing the LID threshold are also discussed. The impact of the test laser parameters on the LID threshold and the transient area near the LID threshold obtained using digital holography are analyzed. The influence of the pre-damage processes on the optical parametric oscillations is reported. Lastly, the prospects for improving ZGP crystals to further increase the LID threshold are discussed.

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Section: Effect Of Pre-damage Phenomena On Zgp Opo Operationmentioning

confidence: 99%

Section: Effect Of Pre-damage Phenomena On Zgp Opo Operationmentioning

confidence: 99%

Section: Effect Of Pre-damage Phenomena On Zgp Opo Operationmentioning

confidence: 99%

“…Figure17. Dependence of the OPO efficiency relative to the absorbed pump power on the pumping PRR (adapted from[69]). …”

mentioning

confidence: 99%

“…Figure 20.Restored image of the ZGP crystal taken with a holographic camera when laser radiation of different powers was applied to the nonlinear optical crystal ZGP (adapted from[69]). …”

mentioning

confidence: 99%

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