Exploration on hold-off capacity of high power repetitively acousto-optic Q-switched Nd:YAG rod laser

Wang, Yibo; Zhang, Zhiyan; Liang, H.; Gao, Jiancun; Qu, Shengchun; Lin, Xin

doi:10.1016/j.ijleo.2019.03.113

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…In recent years, with the rapid development of master oscillator power amplifier (MOPA) systems, ns pulsed laser with kW class high average power has been realized by using Nd:YAG [8][9][10] . However, due to the medium stimulated emission cross section (2.8 × 10 -19 cm 2 ) and upper state lifetime (~230 μs) of Nd:YAG, the PRR of Q-switching especially under continuous wave (CW) pumping is generally limited in the PRR of 50 kHz [11][12][13][14] . K. Liu et al reported a 100 kHz pulsed laser in 2013, which was obtained by 885 nm diode-laser direct end-pumping Nd:YAG rod, but its average power was only 53 W 15 .…”

Section: Introductionmentioning

confidence: 99%

Kilowatt-level 100 kHz nanosecond pulsed laser amplifier via a 205-watt seeding

Yang

Yang²,

Zhou³

et al. 2022

Sixth International Symposium on Laser Interaction With Matter

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Nanosecond (ns) pulsed laser with high average power and high pulse repetition rate above 50 kHz is a potential solution for laser cutting, laser welding, laser cleaning and many other industry processing scenarios. Although Nd:YAG is a widely used solid-state gain medium, it is difficult to obtain ns pulsed laser with repetition rate above 50 kHz due to its limited stimulated emission cross section and thermal distortion under high pump intensity. In this paper, a kilowatt-level 100 kHz high repetition rate ns Nd:YAG master oscillator power amplifier (MOPA) laser system is reported, and a general optimization method was used to obtain a 205 W seed laser with a high repetition rate of 100 kHz. After beam shaping elements, the seed laser was amplified to 1008 W by a two-rod Nd:YAG preamplifier and a two-rod Nd:YAG main amplifier. The pulse-to-pulse stability factor of the pulsed laser was 0.961 and the pulse width was measured as 142.8 ns. The beam parameter product in the horizontal axis and vertical axis were measured as BPPx = 2.81 mm∙mrad and BPPy = 2.78 mm∙mrad respectively. This is the first time to obtain a kilowatt-level average power ns pulsed laser with repetition rate above 50 kHz using Nd:YAG, and the compact MOPA system is also suitable for power scaling and other practical use.

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Section: Introductionmentioning

confidence: 99%

Kilowatt-level 100 kHz nanosecond pulsed laser amplifier via a 205-watt seeding

Yang

Yang²,

Zhou³

et al. 2022

Sixth International Symposium on Laser Interaction With Matter

View full text Add to dashboard Cite

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Fiber Coupled High Power Nd:YAG Laser for Nondestructive Laser Cleaning

Wang

Ren

et al. 2023

Photonics

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In this study, a fiber coupled high power side-pumped Nd:YAG laser system for laser cleaning is presented. Based on the two-rod structure and two stages amplifiers, the maximum average output power of 783 W with corresponding pulse energy of 52 mJ at 15 kHz has been achieved. The fiber coupling efficiencies after the master oscillator, one stage amplifier and two stages amplifiers reach to 99%, 98.3% and 94%, respectively. A laser cleaning machine prototype composed of the master oscillator and one stage amplifier with an average output power of greater than 500 W has been developed and achieved better nondestructive cleaning effect for thermal control coating removal compared with commercial fiber laser cleaning machines. This study provides a new method for developing high power laser sources for nondestructive laser cleaning equipment.

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Exploration on hold-off capacity of high power repetitively acousto-optic Q-switched Nd:YAG rod laser

Cited by 2 publications

References 14 publications

Kilowatt-level 100 kHz nanosecond pulsed laser amplifier via a 205-watt seeding

Kilowatt-level 100 kHz nanosecond pulsed laser amplifier via a 205-watt seeding

Fiber Coupled High Power Nd:YAG Laser for Nondestructive Laser Cleaning

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