We investigated the phenomenon of Kerr beam self-cleaning (KBSC) under a variety of initial modal excitation conditions in the anomalous dispersion region of a graded-index multimode fiber (GRIN-MMF) by solving the generalized multimode nonlinear Schrodinger equation (GMMNLSE). Our results clearly indicate that the phenomenon of beam self-cleaning is highly dependent on the initial modal excitation conditions, and the power threshold (Pth) th ) required for beam self-cleanup varies depending on the initial modal energy distribution conditions considered. We also show that such beam self-cleanup does not occur for any arbitrary initial modal excitation, even at the highest values of input power launched. The temporal and spectral analysis reveals that a spatiotemporal soliton formed initially at a certain power value becomes unstable, thereby shedding dispersive waves and a number of multimode solitons through the fission process, and the nonlinear energy exchanges among the constituent modes lead to a self-cleaned multimode beam. Moreover, we also show that the use of the fiber of longer length permits us to substantially reduce the power threshold (Pth) th ) required to observe beam self-cleaning. Our results realizing the Kerr beam self-cleaning effect with femtosecond pulses in the anomalous dispersion regime of a GRIN-MMF offer innovative and interesting perspectives for the potential extension of the concept of thermalization of classical nonlinear waves to the spatiotemporal domain and may pave the way for a better understanding and control of various novel nonlinear spatiotemporal phenomena in multimode platforms, in developing the next generation of tunable, broadband high-power lasers with nearly single-mode emission.
机构:
Univ Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, ItalyUniv Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy
Niang, A.
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Mansuryan, T.
Krupa, K.
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Univ Bourgogne Franche Comte, ICB, UMR CNRS 6303, 9 Av A Savary, F-21078 Dijon, FranceUniv Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy
Krupa, K.
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Tonello, A.
Fabert, M.
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Univ Limoges, XLIM, UMR CNRS 7252, 123 Av A Thomas, F-87060 Limoges, FranceUniv Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy
Fabert, M.
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Leproux, P.
Modotto, D.
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Univ Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, ItalyUniv Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy
Modotto, D.
Egorova, O. N.
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Russian Acad Sci, Prokhorov Gen Phys Inst, 38 Vavilov St, Moscow 119991, RussiaUniv Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy
Egorova, O. N.
Levchenko, A. E.
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机构:
Russian Acad Sci, Fiber Opt Res Ctr, 38 Vavilov St, Moscow 119333, RussiaUniv Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy
Levchenko, A. E.
Lipatov, D. S.
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Russian Acad Sci, Devyatykh Inst Chem High Pur Subst, 49 Tropinin St, Nizhnii Novgorod 603950, RussiaUniv Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy
Lipatov, D. S.
Semjonov, S. L.
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机构:
Russian Acad Sci, Fiber Opt Res Ctr, 38 Vavilov St, Moscow 119333, RussiaUniv Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy
Semjonov, S. L.
Millot, G.
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机构:
Univ Bourgogne Franche Comte, ICB, UMR CNRS 6303, 9 Av A Savary, F-21078 Dijon, FranceUniv Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy
Millot, G.
Couderc, V
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Univ Limoges, XLIM, UMR CNRS 7252, 123 Av A Thomas, F-87060 Limoges, FranceUniv Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy
Couderc, V
Wabnitz, S.
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机构:
Sapienza Univ Rome, Dipartimento Ingn Informaz Elettron & Telecomunic, Via Eudossiana 18, I-00184 Rome, ItalyUniv Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy
机构:
South China Normal Univ, Guangdong Prov Key Lab Nanophoton Funct Mat & Dev, Guangzhou 510006, Peoples R China
South China Normal Univ, Guangzhou Key Lab Special Fiber Photon Devices &, Guangzhou 510006, Peoples R ChinaSouth China Normal Univ, Guangdong Prov Key Lab Nanophoton Funct Mat & Dev, Guangzhou 510006, Peoples R China
Dai, Jianan
He, Weitao
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South China Normal Univ, Guangdong Prov Key Lab Nanophoton Funct Mat & Dev, Guangzhou 510006, Peoples R China
South China Normal Univ, Guangzhou Key Lab Special Fiber Photon Devices &, Guangzhou 510006, Peoples R ChinaSouth China Normal Univ, Guangdong Prov Key Lab Nanophoton Funct Mat & Dev, Guangzhou 510006, Peoples R China
He, Weitao
Ma, Qichang
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South China Normal Univ, Guangdong Prov Key Lab Nanophoton Funct Mat & Dev, Guangzhou 510006, Peoples R China
South China Normal Univ, Guangzhou Key Lab Special Fiber Photon Devices &, Guangzhou 510006, Peoples R ChinaSouth China Normal Univ, Guangdong Prov Key Lab Nanophoton Funct Mat & Dev, Guangzhou 510006, Peoples R China
Ma, Qichang
Luo, Ai-Ping
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机构:
South China Normal Univ, Guangdong Prov Key Lab Nanophoton Funct Mat & Dev, Guangzhou 510006, Peoples R China
South China Normal Univ, Guangzhou Key Lab Special Fiber Photon Devices &, Guangzhou 510006, Peoples R ChinaSouth China Normal Univ, Guangdong Prov Key Lab Nanophoton Funct Mat & Dev, Guangzhou 510006, Peoples R China
Luo, Ai-Ping
Hong, Weiyi
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South China Normal Univ, Guangdong Prov Key Lab Nanophoton Funct Mat & Dev, Guangzhou 510006, Peoples R China
South China Normal Univ, Guangzhou Key Lab Special Fiber Photon Devices &, Guangzhou 510006, Peoples R ChinaSouth China Normal Univ, Guangdong Prov Key Lab Nanophoton Funct Mat & Dev, Guangzhou 510006, Peoples R China
机构:
Novosibirsk State Univ, Novosibirsk 630090, Russia
Inst Automat & Electrometry SB RAS, Novosibirsk, RussiaNovosibirsk State Univ, Novosibirsk 630090, Russia
Gervaziev, Mikhail D.
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Zhdanov, Innokentiy
Kharenko, Denis S.
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Novosibirsk State Univ, Novosibirsk 630090, Russia
Inst Automat & Electrometry SB RAS, Novosibirsk, RussiaNovosibirsk State Univ, Novosibirsk 630090, Russia
Kharenko, Denis S.
Podivilov, Evgeniy, V
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机构:
Novosibirsk State Univ, Novosibirsk 630090, Russia
Inst Automat & Electrometry SB RAS, Novosibirsk, RussiaNovosibirsk State Univ, Novosibirsk 630090, Russia
Podivilov, Evgeniy, V
Babin, Sergey A.
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Novosibirsk State Univ, Novosibirsk 630090, Russia
Inst Automat & Electrometry SB RAS, Novosibirsk, RussiaNovosibirsk State Univ, Novosibirsk 630090, Russia
Babin, Sergey A.
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Wabnitz, Stefan
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC),
2021,
机构:
Boston Univ, Dept Phys, 590 Commonwealth Ave, Boston, MA 02215 USABoston Univ, Dept Phys, 590 Commonwealth Ave, Boston, MA 02215 USA
Zhang, Yi
Cao, Yingchun
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机构:
Boston Univ, Dept Elect & Comp Engn, 8 St Marys St, Boston, MA 02215 USABoston Univ, Dept Phys, 590 Commonwealth Ave, Boston, MA 02215 USA
Cao, Yingchun
Cheng, Ji-Xin
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Boston Univ, Dept Phys, 590 Commonwealth Ave, Boston, MA 02215 USA
Boston Univ, Dept Elect & Comp Engn, 8 St Marys St, Boston, MA 02215 USA
Boston Univ, Dept Biomed Engn, 8 St Marys St, Boston, MA 02215 USABoston Univ, Dept Phys, 590 Commonwealth Ave, Boston, MA 02215 USA