Spectral behavior of pulsed Bessel beams focused by a dispersive lens |
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Authors: | Liuzhan Pan, Chaoliang Ding, Xiao Yuan,Baida Lü |
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Affiliation: | aDepartment of Physics, Luoyang Normal College, Luoyang 471022, China;bInstitute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China;cState Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China |
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Abstract: | Starting from the Huygens–Fresnel diffraction integral, the analytical expression for the power spectrum of pulsed Bessel beams focused by a dispersive aperture lens is derived and used to study the spectral anomalies of pulsed Bessel beams in the focused field. Numerical calculation results are given to illustrate the dependence of spectral anomalous behavior on the pulse parameters, truncation parameter and material dispersion of the lens. It is shown that near the phase singularities the spectral anomalies may take place. The potential applications of spectral anomalies of ultrashort pulsed beams in information encoding and information transmission are considered. |
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Keywords: | Singular optics Spectral anomaly Pulsed Bessel beam Dispersive lens |
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