High-power mid-infrared ZGP optical parametric oscillator directly pumped by pulsed Tm:YLF laser at 1908 nm

Wei, Xingbin; Zhang, Song; Liu, Zhengyi; Ye, Xianlin; Yin, Wenlong; Ren, Huaijin; Kong, Bin; Zhou, Yuan; Wang, Weimin; Ma, Yue

doi:10.1016/j.optlastec.2023.109135

Cited by 9 publications

(3 citation statements)

References 19 publications

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“…[18][19][20][21] Owing to the point defect-induced absorption at the near-infrared range, most ZGP OPOs are pumped near or longer than 2 mm, and the pumping source is mainly Ho-doped or Tm, Ho co-doped lasers. 22 However, Ho-laser pumped ZGP OPOs require additional optical systems such as Tm fibers or Tm:YLF/YAP lasers to effectively pump Ho:YAG lasers, [23][24][25] which make it too complex to be used in compact devices aimed at countermeasure applications. In addition, the light conversion efficiency from Tm lasers to final mid-infrared lasers (3-12 mm) is low due to the energy loss in each step (B1.9 mm Tm lasers to B2 mm Ho lasers).…”

Section: Introductionmentioning

confidence: 99%

Enhanced near-infrared optical transmission in zinc germanium phosphide crystals via precise magnesium doping

Cheng,

Zhang,

Kong

et al. 2024

Phys. Chem. Chem. Phys.

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Section: Introductionmentioning

confidence: 99%

Enhanced near-infrared optical transmission in zinc germanium phosphide crystals via precise magnesium doping

Cheng,

Zhang,

Kong

et al. 2024

Phys. Chem. Chem. Phys.

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“…Subsequently, in 2018, the utilization of a passively Q-switched Tm: YAP laser at 1.94 μm as the pump source resulted in an average output power of 2.3 W and an optical conversion efficiency of 58% in mid-IR ZGP-OPO at a repetition rate of 6.2 kHz [17]. Most recently, in 2023, an efficient mid-IR ZGP-OPO, pumped by an AO Q-switched Tm:YLF laser at 1908 nm, was demonstrated to achieve an average output power of 17.8 W and a pulse width of 197 ns at a repetition rate of 15 kHz [18].…”

Section: Introductionmentioning

confidence: 99%

Efficient degenerate middle infrared ZGP-OPO pumped by an electro-optically Q-switched Tm:YAP laser

Dai,

Ding,

Liu

et al. 2024

Front. Phys.

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In this paper, we demonstrated an efficient degenerate middle infrared (mid-IR) ZGP-OPO that is pumped by an electro-optically Q-switched diode-pumped Tm:YAP laser. The Tm:YAP laser, operating at a repetition rate of 1 kHz, produced a peak pulse energy of 9.66 mJ at 1.94 μm and a minimum pulse width of 25 ns. Utilizing the Tm:YAP laser as the pump source, a peak average output power of 3.14 W at 3.88 μm was achieved in the degenerate ZGP-OPO with an incident Tm power of 9.4 W, resulting in a slope efficiency of 62.7% and an optical conversion efficiency of 33.4%. The minimum pulse width was measured at 21 ns, leading to a peak power of 149.5 kW. Additionally, the beam quality factor of the degenerate mid-IR ZGP-OPO was evaluated to be approximately 2.7 at the maximum output power level.

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“…The optical and physical properties of ZGP crystal is used by the SNLO software [6]. The progress of the production process of ZGP crystal has led to improvement in the absorption coe cient and damage threshold; these factors have signi cantly in uence on the conversion e ciency [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Influence of pump source beam quality and OPO cavity resonance regime on output characteristics of mid-infrared ZGP-OPO laser

Ebadian,

Tooski,

Maleki

et al. 2023

Preprint

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In this paper, the effect of the pump beam quality on the output results of ZGP-OPO nonlinear conversion pumped by a Q-switched Ho:YLF laser at 2.056 𝜇m wavelength was studied. In the experimental setup, two cavity resonance regimes were applied. First, a U-shape Q-switched resonator at two types of concave-concave and concave-convex structures was investigated. Output energies of 60 and 55 mJ at 24.5 ns of pulse duration were achieved for the resonators mentioned above with double-pass pumping, respectively. In the concave-convex resonator, a far-field beam divergence angle of about 0.7 mrad was recorded, although the conversion efficiency was lower. The maximum conversion efficiency of the linear OPO cavity with a concave-plane structure was recorded. A 30.5 mJ total energy of parametric waves was measured at the PE-DRO resonance regimes pumped by 55 mJ incident energy in the concave-convex resonator at 2056.8 nm Q-switched laser, which corresponds to an optical-to-optical efficiency of 53.5 %. The peak of signal and idler waves are 3779.5 and 4507.6 nm, respectively. The pulse width is about 22.4 ns at the PE-DRO resonance regime

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High-power mid-infrared ZGP optical parametric oscillator directly pumped by pulsed Tm:YLF laser at 1908 nm

Cited by 9 publications

References 19 publications

Enhanced near-infrared optical transmission in zinc germanium phosphide crystals via precise magnesium doping

Enhanced near-infrared optical transmission in zinc germanium phosphide crystals via precise magnesium doping

Efficient degenerate middle infrared ZGP-OPO pumped by an electro-optically Q-switched Tm:YAP laser

Influence of pump source beam quality and OPO cavity resonance regime on output characteristics of mid-infrared ZGP-OPO laser

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