Temporal and spectral properties of ultrashort pulsed Laguerre-Gaussian beams in dispersive media |
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| Authors: | Qihui Zou,Baida Lü |
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| Affiliation: | a College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330027, China
b Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China |
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| Abstract: | The temporal and spectral properties of ultrashort pulsed Laguerre-Gaussian (LG) beams propagating in dispersive media are studied both theoretically and numerically. It is shown that the on-axis pulse broadens with increasing propagation distance and the on-axis spectrum is blueshifted. For the off-axis spectrum the blueshifts decrease and then the spectrum becomes redshifted as the radial distance increases. The propagation of ultrashort pulsed LG beams in free space and of ultrashort pulsed Gaussian beams can be regarded as special cases of our results, and some interesting properties are discussed. |
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| Keywords: | Ultrashort pulsed Laguerre-Gaussian (LG) beam Propagation in dispersive media Temporal and spectral properties |
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