ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Watt-level, green-pumped optical parametric oscillator based on periodically poled potassium titanyl phosphate with high extraction efficiency |
Hang-Hang Yu(俞航航), Zhi-Tao Zhang(张志韬), and Hong-Wen Xuan(玄洪文)† |
GBA Branch of Aerospace Information Research Institute, Chinese Academy of Sciences, Guangzhou 510700, China |
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Abstract We report a compact, efficient optical parametric oscillator (OPO) based on a periodically poled potassium titanyl phosphate (PPKTP) crystal pumped by a 532 nm laser, which generated 1.51 W of average power at the signal wavelength of 709 nm with the pulse duration of ~ 1.0 ns. The extraction efficiency was up to 59%. To the best of our knowledge, this is the first report on Watt-level green-pumped PPKTP-based singly resonant oscillator OPO (SRO-OPO). The precise build-up time of OPO was determined to be 1.6 ns benefitting from the characteristic of twin-peak pulse profile of pump beam. The spectrum width of the idler was also measured to be 4.2 nm with the central wavelength of 2134 nm at 0.2 nm spectral resolution of optical spectrum analyzer. In addition, the beam quality of M2 < 1.9 of generated signal exhibits a good consistency with M2 < 1.5 for the pump source.
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Received: 03 July 2022
Revised: 21 July 2022
Accepted manuscript online: 22 July 2022
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PACS:
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42.55.-f
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(Lasers)
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42.60.Jf
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(Beam characteristics: profile, intensity, and power; spatial pattern formation)
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42.65.-k
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(Nonlinear optics)
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Fund: The work was supported by the Chinese Academy of Sciences Pioneer Hundred Talents Program (Grant No. E1Z1D101) and the Research Project of Aerospace Information Research Institute, Chinese Academy of Sciences (Grant No. E2Z2D101). |
Corresponding Authors:
Hong-Wen Xuan
E-mail: xuanhw@aircas.ac.cn
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Cite this article:
Hang-Hang Yu(俞航航), Zhi-Tao Zhang(张志韬), and Hong-Wen Xuan(玄洪文) Watt-level, green-pumped optical parametric oscillator based on periodically poled potassium titanyl phosphate with high extraction efficiency 2022 Chin. Phys. B 31 124203
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