Colored conical emission in BBO crystal induced by intense femtosecond pulses |
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| Authors: | Jie Bi Xing Liu Peixiang Lu |
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| Institution: | a Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Chinab School of Mathematics and Physics, China University of Geosciences, Wuhan 430074, China |
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| Abstract: | We present the experimental and theoretical study of colored conical emission (CCE) during intense femtosecond pulses propagating in a β-barium borate (BBO) crystal. CCE revealed special nonlinear dynamics of the strong coupling between the fundamental and second harmonic pulses due to the spatiotemporal modulation instability (MI). The underlying physics of CCE involve three three-photon processes, according to which the beam angular spectra was calculated on the phase-matching conditions and accords with the experimental observation. |
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| Keywords: | Colored conical emission Femtosecond laser pulse Conical angle Phase matching |
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