A High-Energy, Narrow-Pulse-Width, Long-Wave Infrared Laser Based on ZGP Crystal

Qian, Chuanpeng; Yu, Ting; Liu, Jing; Jiang, Yongli; Wang, Sijie; Shi, Xiangchun; Ye, Xisheng; Chen, Weibiao

doi:10.3390/cryst11060656

Cited by 11 publications

(5 citation statements)

References 16 publications

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“…C. Qian reported a ZnGeP2 (ZGP) OPO pumped with a three-stage Ho:YAG master oscillator power amplifier (MOPA). The maximal average output powers were 3.15 W at 8.2 µm and 11.4 W at 2.8 µm [3]. K. Yang demonstrated a non-critical phase-matching BaGa 4 Se 7 OPO pumped with a Q-switched Ho: YLF laser.…”

Section: Introductionmentioning

confidence: 98%

Gain Measurement of ZnGeP2 Optical Parametric Oscillator Pulses in a High-Pressure CO2 Amplifier

Zhu,

Liu,

et al. 2024

Photonics

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Laser pulse amplification by a high-pressure CO2 amplifier in the long-wave infrared (LWIR) spectral range is a feasible technology for strong-field physics research. Crystals such as ZnGeP2 (ZGP) have high nonlinear coefficients and transmittance in the LWIR region, with spectral widths of generated pulses closely matching the gain spectrum of high-pressure CO2 amplifiers. Therefore, ZGP optical parametric oscillation (OPO) may allow higher-efficiency energy extraction in amplifiers, improving the output characteristics of LWIR amplification systems. In this study, the gain measurement of ZGP OPO pulses amplified by a high-pressure CO2 amplifier was carried out for the first time. Single-detector acquisition was utilized to achieve a unified sensor responsivity, and a laser signal-triggered function generator was used to synchronize the seed pulse and amplifier. Six-pass amplification was performed successively, yielding an amplification factor of 4.5 for the peak power and a maximum coefficient of 0.42% cm−1 for the small-signal gain. The gain and loss effect during small-signal amplification were discussed. The potential capability of acquiring ultra-short pulses with ZGP OPO pulses was also explored with the FFT function of MATLAB software.

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Section: Introductionmentioning

confidence: 98%

Gain Measurement of ZnGeP2 Optical Parametric Oscillator Pulses in a High-Pressure CO2 Amplifier

Zhu,

Liu,

et al. 2024

Photonics

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“…These OPOs are pumped by the wellestablished Q-switched Ho 3+ :YAG lasers at 2.1 µm and are capable of high-efficiently generating at 3.5-5 µm, with an average power of up to 160 W or pulse energy of up to 200 mJ at a pulse width of 10-60 ns and repetition rate from a few Hz to 100 kHz [17][18][19][20][21][22]. Moreover, the Ho 3+ :YAG laser-pumped OPOs based on ZnGeP 2 crystals operate efficiently at wavelengths 6-7 µm, 8.1-8.3 µm, and 9-10 µm [23][24][25][26]. The ZGP crystals used for mid-IR OPGs and OPAs in broadband laser systems were also able to generate ultra-short picosecond and femtosecond pulses [15,[27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

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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“…At present, the mainly nonlinear crystal materials for OPO include KTiAsO 4 (KTA), ZnGeP 2 , KTiOPO 4 , and periodically poled LiNbO 3 (PPLN). [1][2][3][4] The characteristics of PPLN, such as high nonlinear coefficient (d 33 ¼ 27 Pm∕V), wide transparency range (0.4 to 5 μm), and stable properties, make it prominent among other OPO materials. The emergence of MgO doping technology has improved the damage resistance threshold of PPLN.…”

Section: Introductionmentioning

confidence: 99%

“…It has the advantages of narrow linewidth, compact structure, and high conversion efficiency. At present, the mainly nonlinear crystal materials for OPO include KTiAsO4 (KTA), ZnGeP2, KTiOPO4, and periodically poled LiNbO3 (PPLN) 1 – 4 The characteristics of PPLN, such as high nonlinear coefficient (d33=27 Pm/V), wide transparency range (0.4 to 5 μm), and stable properties, make it prominent among other OPO materials.…”

Section: Introductionmentioning

confidence: 99%

High conversion efficiency MgO: periodically poled LiNbO3 optical parametric oscillator using an unstable cavity

Jiang

Cheng

et al. 2022

Opt. Eng.

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A high conservation efficiency periodically poled LiNbO 3 (PPLN) optical parametric oscillator (OPO) based on the plano-convex unstable resonant cavity is demonstrated. The OPO is pumped by a Q-switch quasi-continuous-wave Nd∶YVO 4 with a wavelength of 1064 nm. The thermal effect of the nonlinear crystal and the mode distribution under the plano-convex cavity are analyzed. Through temperature tuning, the wavelength of the signal laser covers 1471.4 to 1510.4 nm. When the temperature is 30°C, the repetition rate is 30 kHz, and the pump power is 5.7 W. A PPLN-OPO based on a plano-convex cavity generates a 1471.4-nm laser with a maximum output power of 1.09 W and pulse duration of 17.14 ns. The highest pump-to-signal conversion efficiency is 28.71%. When the repetition rate is 40 kHz, the highest conversion efficiency of 29.29% is achieved at the pump power of 2.8 W.

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A High-Energy, Narrow-Pulse-Width, Long-Wave Infrared Laser Based on ZGP Crystal

Cited by 11 publications

References 16 publications

Gain Measurement of ZnGeP2 Optical Parametric Oscillator Pulses in a High-Pressure CO2 Amplifier

Gain Measurement of ZnGeP2 Optical Parametric Oscillator Pulses in a High-Pressure CO2 Amplifier

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

High conversion efficiency MgO: periodically poled LiNbO3 optical parametric oscillator using an unstable cavity

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