High average power Q-switched 1314  nm two-crystal Nd:YLF laser

Botha, Roelf; Koen, W.; Esser, M. J. Daniel; Bollig, C.; Combrinck, W. L.; Bergmann, M Von; Strauss, H. J.

doi:10.1364/ol.40.000495

Cited by 17 publications

(4 citation statements)

References 14 publications

(22 reference statements)

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“…These attracting features are capable of generating high power output with high beam quality, especially the near-diffraction-limited operation of relative low gain lines which has been hindered by the onset of strong thermal effects. Excellent results of diode-pumped Nd:YLF crystal 1.3 μm lasers have been reported by many researchers [7][8][9][10][11][12][13]. With nonlinear optical frequency doubling technology, the red lasers can be achieved which can be applied in optical clock, laser cooling and precision spectroscopy of hydrogenic systems [7,8].…”

Section: Introductionmentioning

confidence: 90%

High-power 660.5 nm red laser from diode-side-pumped intracavity frequency-doubled Nd:YLF laser

Wang

Chen

et al. 2015

Laser Phys. Lett.

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Section: Introductionmentioning

confidence: 90%

High-power 660.5 nm red laser from diode-side-pumped intracavity frequency-doubled Nd:YLF laser

Wang

Chen

et al. 2015

Laser Phys. Lett.

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“…2011年, Zhao等 [11] 报道了在 1.3 µm的 Nd:YVO 4 声光调 Q激光器中, 重复频率为10 kHz时, 获得最窄脉冲宽度6.5 ns 的激光输出, 对应平均功率158 mW, 其最大单脉冲能量 0.158 mJ. 2014年 , Liu等 [12] 报道了在…”

Section: 引言unclassified

1.3-μm 2.8-ns electro-optical cavity damping Nd:YVO4 laser

Yao¹,

Ge²,

Xia³

et al. 2023

Acta Phys. Sin.

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1.3 μm Nd laser has significant practical applications in various fields, such as fiber communication, medical treatment, frequency conversion, and scientific research, etc. Many applications of a 1.3 μm laser, especially like frequency conversion, benefit much from a short pulse width with high peak power. In the paper, an electro-optical cavity dumping Nd:YVO4 laser at 1342 nm wavelength has been studied theoretically and experimentally. The pulse width for an electro-optical cavity dumping laser is determined by the optical length of the cavity. A narrower pulse width can be obtained by reducing the length of the cavity and the round trip time of the laser in the cavity. However, when the round trip time in the cavity approaches to the falling edge time of the electro-optical switch, shortening the length of the cavity will not get a narrower pulse width, and the falling edge time of the electro-optical switch will influence the laser pulse width. The temporal characteristics of the laser pulse are simulated when the falling edge time of the electro-optical switch is close to the round trip time in the cavity. Influences of the falling edge time of the electro-optical switch on the laser pulse duration are analyzed theoretically. The modified rate equation is used to study the relationship between the falling edge time and the laser pulse width. We demonstrate an electro-optical cavity dumping Nd:YVO4 laser. The 0.3 at.% Nd:YVO4 placed in a short Plano-concave cavity is in-band pumped by an 880 nm quasi-continuous-wave diode. A fiber-coupled diode laser module (NA=0.22) with a power of 30 W was used. A LiNbO3 electro-optical switch was employed for the cavity-dumping. The 1342 nm cavity-dumping laser operates at a repetition rate of 1kHz, and a single-pulse energy of 0.21 mJ is obtained with a pulse width of 2.8 ns. Near-diffraction-limited beam quality with an M2 value of < l.2 is achieved. The setup provides efficient second harmonic generation at 671 nm using a MgO:PPLN crystal, and the pulse width is 1.8 ns. To the best of our knowledge, this is the shortest pulse duration obtained from 1.3μm actively Q-switched Nd-doped laser.

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“…A promising direction is the application of single-crystal active elements with a gradient profile of dopant ions. In particular, the increased efficiency of such active elements has been experimentally demonstrated for the case of doping with neodymium ions [24][25][26] and ytterbium ions [27]. As in the case of multi-segmented active elements, gradient doping makes it possible to reduce the temperature gradient in the active element [28], however, multiple interfaces on which optical losses can occur is absent.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Yb:YAG Active Mirrors for High Power Laser Amplifiers

Petrov,

Kuptsov,

Kuptsova

et al. 2023

Photonics

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The work is aimed at the investigation of the influence of nonlinear active ions concentration profiles in Yb:YAG laser elements on temperature distribution and wavefront distortions during amplification using sub-kilowatt level diode pumping. A mathematical model is presented for the theoretical study of the amplification process in crystals with cubic crystal system. A detailed comparison of Yb:YAG active elements with the same thickness and absorbed pumping power, but with various concentration profiles of Yb3+, ions is carried out. It is shown that the use of active elements with an increasing dopant concentration in the pump beam direction allows one to optimize the temperature profile inside the active element and, thus, reduce the thermal-induced wavefront distortions of the amplified radiation. Modeling is carried out for the experimentally grown crystal with linear concentration gradient profile. It is shown that the linear doping profile with a gradient of 0.65 at.%/mm allows increasing the small-signal gain up to 10% and decreasing the thermal-induced wavefront distortions by ~15%.

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High average power Q-switched 1314 nm two-crystal Nd:YLF laser

Cited by 17 publications

References 14 publications

High-power 660.5 nm red laser from diode-side-pumped intracavity frequency-doubled Nd:YLF laser

High-power 660.5 nm red laser from diode-side-pumped intracavity frequency-doubled Nd:YLF laser

1.3-μm 2.8-ns electro-optical cavity damping Nd:YVO<sub>4</sub> laser

Enhanced Yb:YAG Active Mirrors for High Power Laser Amplifiers

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