• High Power Laser Science and Engineering
  • Vol. 12, Issue 6, 06000e71 (2024)
Yuntao Bai1,2, Xin Ding1,2,*, Guoxin Jiang1,2, Peng Lei1,2..., Ying Xie1,2, Jiangeng Du1,2, Yang Sun1,2, Liang Wu1,2, Guizhong Zhang1,2 and Jianquan Yao1,2|Show fewer author(s)
Author Affiliations
  • 1Institute of Laser and Opto-electronics, School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, China
  • 2Key Laboratory of Optoelectronic Information Technology (Ministry of Education), Tianjin University, Tianjin, China
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    DOI: 10.1017/hpl.2024.40 Cite this Article Set citation alerts
    Yuntao Bai, Xin Ding, Guoxin Jiang, Peng Lei, Ying Xie, Jiangeng Du, Yang Sun, Liang Wu, Guizhong Zhang, Jianquan Yao, "Performance enhancement in the long-wavelength low-gain region of Ti:sapphire lasers by an efficient stimulated Raman scattering process," High Power Laser Sci. Eng. 12, 06000e71 (2024) Copy Citation Text show less

    Abstract

    We demonstrated a method to improve the output performance of a Ti:sapphire laser in the long-wavelength low-gain region with an efficient stimulated Raman scattering process. By shifting the wavelength of the high-gain-band Ti:sapphire laser to the long-wavelength low-gain region, high-performance Stokes operation was achieved in the original long-wavelength low-gain region of the Ti:sapphire laser. With the fundamental wavelength tuning from 870 to 930 nm, first-order Stokes output exceeding 2.5 W was obtained at 930–1000 nm, which was significantly higher than that directly generated by the Ti:sapphire laser, accompanied by better beam quality, shorter pulse duration and narrower linewidth. Under the pump power of 42.1 W, a maximum first-order Stokes power of 3.24 W was obtained at 960 nm, with a conversion efficiency of 7.7%. Furthermore, self-mode-locked modulations of first- and second-order Stokes generation were observed in Ti:sapphire intracavity solid Raman lasers for the first time.
    dndt=SP(t)cσnϕLnTnτ, ((1))

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    dϕLdt=cσnϕLlLnTLLϕLτL2geffhc2ϕSϕLlSλLtLnK, ((2))

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    dϕSdt=2geffhc2ϕSϕLlSλStSnKϕSτS, ((3))

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    SP(t)=2ln2ηP0λpππfpT0hcωp2lLexp[(2ln2T0t)2], ((4))

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    τL,S=tL,SαL,Sln(RL,S)=2LLO,SOc[αL,Sln(RL,S)], ((5))

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    PL,S=fpc2πωL,S2h2λL,Sln(1RL,S)0tbϕL,Sdt. ((6))

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    τreal=τmeasure2τprobe2τoscilloscope2, ((7))

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    τoscilloscope×BW=0.350.4, ((8))

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    Yuntao Bai, Xin Ding, Guoxin Jiang, Peng Lei, Ying Xie, Jiangeng Du, Yang Sun, Liang Wu, Guizhong Zhang, Jianquan Yao, "Performance enhancement in the long-wavelength low-gain region of Ti:sapphire lasers by an efficient stimulated Raman scattering process," High Power Laser Sci. Eng. 12, 06000e71 (2024)
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