High Power Quasi-Continuous-Wave Diode-End-Pumped Nd:YAG Slab Amplifier at 1319 nm

Zheng, Jian-Kui; Yang, Bo; Xie, S.; Zuo, Jun-Wei; Wang, Pengyuan; Guo, Ya-Ding; Liu, Biaolong; Peng, Qinjun; Cui, Dafu; Lei, Wenqiang; Xu, Zuyan

doi:10.1088/0256-307x/30/7/074202

Cited by 14 publications

(6 citation statements)

References 24 publications

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“…So that the beam quality deteriorates sharply and the output power is limited, even causing the damage to the gain media. With the slab laser media proposed, theoretical and experimental studies have shown that slab structure can greatly increase heat dissipation and effectively reduce thermal effects, thus achieving high power and high beam quality laser output [9][10][11] . Among various slab lasers, partially end-pumped slab lasers are of particular interest.…”

Section: Introductionmentioning

confidence: 99%

Partially end-pumped 1319 nm Nd:YAG slab laser

Zhang¹,

Chen²,

Liu³

et al. 2023

Third Optics Frontier Conference (OFS 2023)

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The 1319 nm laser is widely used in sodium beacon, optical communication and laser medical fields, and also a potential pump source for 4.3 μm output. In this work, we reported a laser diode partially end-pumped Nd:YAG slab laser operation at 1319 nm. A stable plano-concave cavity was adopted. The maximum continuous output power of 24.33 W was obtained for the absorbed pump power of 222 W, exhibiting an optical conversion efficiency of 10.96% and a slope efficiency of 23.06%. The beam quality was measured to be M2 = 1.19 in the vertical direction.

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Section: Introductionmentioning

confidence: 99%

Partially end-pumped 1319 nm Nd:YAG slab laser

Zhang¹,

Chen²,

Liu³

et al. 2023

Third Optics Frontier Conference (OFS 2023)

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“…It is a common way to realize self-excited oscillation suppression by roughening the side of the working material and thus damaging the side vibration conditions. Zheng Jiankui et al prevented pump gain loss by roughening the side of crystal Flat noodles, and obtained 84 mJ 1319 nm laser output [8] . The disadvantage of this method is that the side of the roughening cannot be in good contact with the heat sink, thus affecting the heat dissipation of the working material.…”

Section: Introductionmentioning

confidence: 99%

A high energy end pumped Q-switched Nd:YAG laser

Xie,

Wang,

Cai

et al. 2023

Third International Computing Imaging Conference (CITA 2023)

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High energy Q-switched Nd:YAG laser has the characteristics of high peak power and narrow pulse width, which has been widely used in mass spectrometry, laser radar, laser indication and other fields. Compared with lamp pumped solid state lasers, laser diode pumped solid state lasers (all solid state lasers) have high optical-optical conversion efficiency and low waste heat generation rate, which greatly improve the reliability and environmental adaptability of the system and become a research hotspot for obtaining high-energy Q-switched Nd:YAG lasers. The end pumped all solid state laser can match the pumping beam with the laser oscillation mode, which is conducive to improving the beam quality and conversion efficiency of the laser. However, the high gain of the laser medium formed by the end pump is easy to cause self-excited oscillation, which greatly limits the improvement of the output energy of the Q-switched Nd:YAG laser. Therefore, restraining self-excited oscillation and improving the dynamic static ratio become the key technologies to obtain high energy end pumped all solid state Q-switched Nd:YAG laser. In order to obtain the 1064 nm Q-switched Nd:YAG laser output with high energy, high conversion efficiency and compact structure, based on the physical characteristics of the linear change of LD wavelength with temperature, this study changes the pump wavelength by adjusting the LD temperature to make it deviate from the absorption peak of the laser working material, and obtains effective control of the pump end gain, so as to achieve the suppression of self-excited oscillation. It is found that the LD energy and divergence angle have no obvious change with the temperature change, which provides a good precondition for LD wavelength optimization. The LD working temperature is optimized according to the dynamic static ratio and the output laser energy. Finally, the LD is selected to work at 30 ℃, and the corresponding LD wavelength is 797.5 nm, which deviates from the absorption peak of Nd:YAG crystal and is at an absorption wave valley. Finally, under the maximum pumping current of 170 A (20 Hz) for LD, the maximum output energy of Q-switched 1064nm laser is 95 mJ. The corresponding optical-optical conversion efficiency is 18%, and the dynamic static ratio of Q switching is 73%.

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“…Compared to traditional solid-state lasers, InnoSlab lasers have higher power output and better beam quality due to their cavity design and optical coupling characteristics [16,17]. Recently, researchers have shown that both InnoSlab amplifier and resonator schemes are able to generate 1319 nm laser radiations [18][19][20]. In 2013, a high-power, high-beam-quality, diode end-pumped Nd:YAG InnoSlab amplifier at 1319 nm was reported.…”

Section: Introductionmentioning

confidence: 99%

“…In 2013, a high-power, high-beam-quality, diode end-pumped Nd:YAG InnoSlab amplifier at 1319 nm was reported. In a five-pass configuration, the amplifier yielded a 42.3 W output with an optical-optical efficiency of 6.5% and beam quality factors of M 2 x = 1.13 and M 2 y = 2.16 in the orthogonal directions [19]. In 2022, H.L.…”

Section: Introductionmentioning

confidence: 99%

210-W, Quasi-Continuous Wave, Nd:YAG InnoSlab Laser at 1319 nm

Meng

Luo

et al. 2023

Photonics

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In this paper, we demonstrate a high-power, quasi-continuous wave using a laser-diode dual-end-pumped Nd:YAG InnoSlab laser at 1319 nm. The maximum average output power of 210 W at a single 1319 nm wavelength is obtained with an optical-optical efficiency of 18.8% from absorbed pump power to laser output. The output pulse duration is 246 μs at the repetition of 500 Hz, and the beam quality factors of M2 are 1.37 and 1.47 in the horizontal and vertical directions, respectively. This is the first report on high-power, quasi-continuous wave using Nd:YAG InnoSlab lasers at 1319 nm with good beam quality.

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High Power Quasi-Continuous-Wave Diode-End-Pumped Nd:YAG Slab Amplifier at 1319 nm

Cited by 14 publications

References 24 publications

Partially end-pumped 1319 nm Nd:YAG slab laser

Partially end-pumped 1319 nm Nd:YAG slab laser

A high energy end pumped Q-switched Nd:YAG laser

210-W, Quasi-Continuous Wave, Nd:YAG InnoSlab Laser at 1319 nm

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