• High Power Laser Science and Engineering
  • Vol. 11, Issue 2, 02000e18 (2023)
Xin Zeng1,2, Shuzhen Cui2, Huawei Jiang2, Bowen Ruan1,2..., Xin Cheng1,2, Jiaqi Zhou2, Zhiquan Lin1,2, Xuezong Yang1, Weibiao Chen1,2 and Yan Feng1,2,*|Show fewer author(s)
Author Affiliations
  • 1Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China
  • 2Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China
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    DOI: 10.1017/hpl.2023.28 Cite this Article Set citation alerts
    Xin Zeng, Shuzhen Cui, Huawei Jiang, Bowen Ruan, Xin Cheng, Jiaqi Zhou, Zhiquan Lin, Xuezong Yang, Weibiao Chen, Yan Feng, "Single-frequency upconverted laser generation by phase summation," High Power Laser Sci. Eng. 11, 02000e18 (2023) Copy Citation Text show less

    Abstract

    The phase summation effect in sum-frequency mixing process is utilized to avoid a nonlinearity obstacle in the power scaling of single-frequency visible or ultraviolet lasers. Two single-frequency fundamental lasers are spectrally broadened by phase modulation to suppress stimulated Brillouin scattering in fiber amplifier and achieve higher power. After sum-frequency mixing in a nonlinear optical crystal, the upconverted laser returns to single frequency due to phase summation, when the phase modulations on two fundamental lasers have a similar amplitude but opposite sign. The method was experimentally proved in a Raman fiber amplifier-based laser system, which generated a power-scalable sideband-free single-frequency 590 nm laser. The proposal manifests the importance of phase operation in wave-mixing processes for precision laser technology.
    E~n(t)=Enei[ωnt+φn(t)]+c.c., ((1))

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    P~(2)(ω1+ω2)=2ε0χ(2)E1E2ei{(ω1+ω2)t+[φ1(t)+φ2(t)]}+c.c., ((2))

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    Xin Zeng, Shuzhen Cui, Huawei Jiang, Bowen Ruan, Xin Cheng, Jiaqi Zhou, Zhiquan Lin, Xuezong Yang, Weibiao Chen, Yan Feng, "Single-frequency upconverted laser generation by phase summation," High Power Laser Sci. Eng. 11, 02000e18 (2023)
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