High Repetition Rate, Tunable Mid-Infrared BaGa4Se7 Optical Parametric Oscillator Pumped by a 1 μm Nd:YAG Laser

He, Yixin; Yan, Chao; Chen, Kai; Xu, Degang; Li, Jining; Zhong, Kai; Wang, Yuye; Yao, Rui; Yao, Jiyong; Yao, Jianquan

doi:10.3390/app12147197

Cited by 10 publications

(5 citation statements)

References 28 publications

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“…From Refs [7][8][9][10][11][12][13], we can see that the wavelength resolution of angular tuning is above 100 nm when the angle is changed by 1 • , while the wavelength resolution of temperature tuning is around 3 nm when the temperature is changed by 1 • C. The resolution of temperature tuning is two orders of magnitude higher than that of angle tuning.…”

Section: Temperature Tuning At a Fixed Angle (θ = 46°)mentioning

confidence: 96%

“…The average ∆λ/∆θ was 1581 nm/ • while the angle of BGSe was adjusted from 41.4 • to 44.6 • . In 2022, He et al [13] achieved the output of a 250 mW high-average-power 3.42-4.73 mm mid-and mid-infrared laser using a 1064 nm Nd: YAG to pump BGSe OPO (DP-SRO structure). The phase matching angle of its BGSe crystal was adjusted from 51.7 • to 56 • , yielding a ∆λ/∆θ of about 305 nm/ • .…”

Section: Introductionmentioning

confidence: 99%

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High-Resolution Laser in Widely Tunable Range (4.16–7.13 µm) Based on Mid-Infrared BaGa4Se7 Optical Parametric Oscillator Pumped at 1064 nm

Zhao,

Kong,

Zou

et al. 2023

Photonics

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A widely tunable 4.16–7.31 μm high-resolution mid-infrared optical parametric oscillator with a type-I BaGa4Se7 (BGSe) crystal pumped by a 1064 nm laser was demonstrated for the first time. We have achieved a wavelength tuning accuracy of less than 5 nm through simultaneously performing temperature tuning and angular tuning on the BGSe (46°, 0°) Optical Parametric Oscillation (OPO). The wavelength resolution will be less than 1 nm when using commercial temperature control equipment.

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Section: Temperature Tuning At a Fixed Angle (θ = 46°)mentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

High-Resolution Laser in Widely Tunable Range (4.16–7.13 µm) Based on Mid-Infrared BaGa4Se7 Optical Parametric Oscillator Pumped at 1064 nm

Zhao,

Kong,

Zou

et al. 2023

Photonics

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“…It should be noted that the low thermal conductivity and low optical breakdown threshold ~0.25 J/cm 2 of AGS and AgGaSe 2 single crystals limit their use as nonlinear elements for OPO of mid-IR radiation. In [34], an OPO based on a BaGa 4 Se 7 crystal was implemented with pumping by pulsed radiation at a wavelength of 1.064 μm. The spectral range of the generated radiation was from 3.42-4.73 μm for the idle wave.…”

Section: Introductionmentioning

confidence: 99%

Tunable optical parametric oscillator based on ZnGeP2 crystal for greenhouse gas remote sensing systems

Yudin,

Zinoviev,

Podzyvalov

et al. 2024

Front. Phys.

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This work is devoted to the development of a compact source of coherent radiation with frequency-energy characteristics and a spectral generation range that allows remote determination of background concentrations of greenhouse gases in the atmosphere. The aim of this work was to create a frequency parametric converter based on ZGP, pumped by Ho:YAG laser radiation. For use as a source in a mobile lidar for remote determination of the concentration of greenhouse gases in the atmosphere. In the course of the research, a layout of an Optical parametric oscillator OPO based on a ZGP crystal with Ho:YAG laser radiation pumping was developed. The system’s continuous failure-free operation time was 1.5 h at a pulse repetition rate of 10 kHz and a pulse energy of the generated radiation of 0.08 mJ. The tuning range of the OPO was from 3.3 to 5 μm when using a Lyot filter. The losses from the average generation power when the Lyot filter was introduced into the resonator were 30%. At the same time, it was possible to achieve a linewidth of the generated radiation of 0.7 nm. The divergence of the generated radiation did not exceed 1.5 mrad.The absorption spectrum of gases CO2, CH4, N2O, CO in a gas cell was simulated for the entire generation range of the ZnGeP2-based OPO. As a result of the simulation, the most intense absorption lines of gases CO2, CH4, N2O, CO in the OPO tuning range were revealed, the central wavelengths of the absorption lines and their spectral width were determined.

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“…With a model that was still very new, based on a BGSe-OPO pumped by a more simple and compact 1064 nm laser oscillator, we successfully scaled pulse energy at 6.45 µm to 1.23 mJ under 58 mJ pump energy, with a pulse duration of 24.3 ns and a PRR of 10 Hz, corresponding to an o-o conversion efficiency of 2.1% [19], where an unfocused pump spot with a diameter of 2 mm and a BGSe crystal with the length of 18 mm were employed. In addition, for OPO laser system, as shown in [20], the output pulse energy and o-o conversion efficiency decrease with the increase in PRR due to the severe thermal effect. Further, the available 1064 nm light source with high pulse energy in our laboratory works at 10 Hz.…”

Section: Introductionmentioning

confidence: 99%

A Stable and Compact Mid-IR at 6.45 μm Exceeding 6 mJ of Pulse Energy BaGa4Se7 Optical Parametric Oscillator

Wen

Shen

Yu³

et al. 2023

Applied Sciences

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We experimentally demonstrate a stable and compact high pulse energy mid-infrared (MIR) 6.45 μm laser, which is produced by an optical parametric oscillator (OPO) based on the non-oxide BaGa4Se7 (BGSe) nonlinear crystal pumped by 1064 nm Nd:YAG laser oscillator. With optimizing the parameters of the OPO system, a record high idler energy of 6.76 mJ at 6.45 μm was obtained with 18.85 ns of pulse duration (FWHM) at the repetition rate of 10 Hz under 93.5 mJ of pump energy, corresponding to an optical-to-optical conversion efficiency up to 7.23% from 1064 nm to 6.45 μm. The experimental results were in close approximation with the theoretical calculations. To date, it is both the highest MIR pulse energy and the highest conversion efficiency at 6.45 μm for any 1 μm pumped OPOs. Further, excellent output energy stability is demonstrated, with an energy fluctuation of less than ±0.5% over 165 min. Such a laser is interesting for both scientific and medical applications, including, for instance, for trace gas analysis and tissue ablation.

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High Repetition Rate, Tunable Mid-Infrared BaGa4Se7 Optical Parametric Oscillator Pumped by a 1 μm Nd:YAG Laser

Cited by 10 publications

References 28 publications

High-Resolution Laser in Widely Tunable Range (4.16–7.13 µm) Based on Mid-Infrared BaGa4Se7 Optical Parametric Oscillator Pumped at 1064 nm

High-Resolution Laser in Widely Tunable Range (4.16–7.13 µm) Based on Mid-Infrared BaGa4Se7 Optical Parametric Oscillator Pumped at 1064 nm

Tunable optical parametric oscillator based on ZnGeP2 crystal for greenhouse gas remote sensing systems

A Stable and Compact Mid-IR at 6.45 μm Exceeding 6 mJ of Pulse Energy BaGa4Se7 Optical Parametric Oscillator

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