Nonlinear X-shaped waves by second-harmonic generation with collimated femtosecond pulses
被引:5
作者:
Lei, Wenqi
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E China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R ChinaE China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China
Lei, Wenqi
[1
]
Wu, Jian
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E China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R ChinaE China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China
Wu, Jian
[1
]
Cai, Hua
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E China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R ChinaE China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China
Cai, Hua
[1
]
Zeng, Heping
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E China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R ChinaE China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China
Zeng, Heping
[1
]
机构:
[1] E China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China
Nonlinear X-shaped angle-wavelength spectrum of the generated second-harmonic wave is observed for a collimated femtosecond pulse of a large beam waist, where the spatiotemporal balance is originated from mutual coupling of the effective nonlinear Kerr effects, pulse frequency chirp, and negative phase shift from cascaded quadratic processes with appropriate phase mismatch. (C) 2009 Optical Society of America