High power fiber-coupled acousto-optically Q-switched 532 nm laser with a side-pumped Nd:YAG laser module

Yuan, Xiandan, Zhang, Ling, Hu, Zhanggui, Liu, Yannan, Zhang, Zhiyan, Yu, Haijuan, Wu, Peng, Wang, Lirong, Zhao, Weifang, Wang, Yibo, Zhao, Pengfei, Wang, Jinsong, Lin, Xuechun

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For Russian citation (Opticheskii Zhurnal):

X. Yuan, L. Zhang, Zh. Hu, Y. Liu, Zh. Zhang, H. Yu, P. Wu, L. Wang, W. Zhao, Y. Wang, P. Zhao, J. Wang, X. Lin High power fiber-coupled acousto-optically Q-switched 532 nm laser with a side-pumped Nd:YAG laser module (Мощный излучатель с длиной волны 532 нм с волоконным выводом излучения на основе Nd:YAG лазера с боковой диодной накачкой и акустооптической модуляцией добротности) [на англ. яз.] // Оптический журнал. 2017. Т. 84. № 6. С. 16–20.

X. Yuan, L. Zhang, Zh. Hu, Y. Liu, Zh. Zhang, H. Yu, P. Wu, L. Wang, W. Zhao, Y. Wang, P. Zhao, J. Wang, X. Lin High power fiber-coupled acousto-optically Q-switched 532 nm laser with a side-pumped Nd:YAG laser module (Мощный излучатель с длиной волны 532 нм с волоконным выводом излучения на основе Nd:YAG лазера с боковой диодной накачкой и акустооптической модуляцией добротности) [in English] // Opticheskii Zhurnal. 2017. V. 84. № 6. P. 16–20.

For citation (Journal of Optical Technology):

Xiandan Yuan, Ling Zhang, Zhanggui Hu, Yannan Liu, Zhiyan Zhang, Haijuan Yu, Peng Wu, Lirong Wang, Weifang Zhao, Yibo Wang, Pengfei Zhao, Jinsong Wang, and Xuechun Lin, "High power fiber-coupled acousto-optically Q-switched 532 nm laser with a side-pumped Nd:YAG laser module," Journal of Optical Technology. 84(6), 373-376 (2017). https://doi.org/10.1364/JOT.84.000373

Abstract:

We demonstrated a high power laser at 532 nm by frequency-doubling of an acousto-optically Q-switched and side-pumped Nd:YAG laser at 1064 nm using a compact linear cavity. The average output power of the pulsed fundamental laser at 1064 nm was as high as 299 W. The laser employed two acousto-optic Q-switches placed orthogonally with each other to improve the hold-off capacity. Through intracavity frequency doubling with a type II non-critically phase-matched LBO crystal, a 165 W average power of the frequency-doubled output at 532 nm was generated with a repetition rate of 20 kHz and pulse width of 160 ns, which corresponds to a pulse energy of 8.25 mJ and a peak power 51.6 kW, respectively. The output power of the green laser was very stable and the stability at various output power was measured. The RMS instability was ±1.4% when the output power of 532 nm was 135 W. After coupling the 165 W output power at 532 nm into an 800 μm fiber, the final output from the optical fiber was 149 W with a coupling efficiency of 90.3%.

Keywords:

acousto-optical, Q-switch, fiber-coupled, high power

Acknowledgements:

This research has been supported by Beijing Engineering Technology Research Center of All-Solid-State Lasers Advanced Manufacturing, the National High Technology Research and Development Program of China (No. 2014AA032607), the National Natural Science Foundation of China (No. 61404135, 61405186, 61308032 and 61308033), the project of “The research of high energy picosecond laser used for fine processing”, and Instrument Developing Project of the Chinese Academy of Sciences (No. yz201302).

OCIS codes: 140.3580, 140.3515, 140.3540

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