Propagation of Single-Mode Fibre Laser Beams through an Optical ABCD System with Circular Aperture at the Fibre Output End |
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| Authors: | DUAN Kai-Liang LI Jian-Feng ZHAO Wei WANG Yi-Shan |
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| Affiliation: | State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119 |
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| Abstract: | Based on the expansion expression of the fundamental mode of a single-mode fibre in terms of Laguerre--Gauss modes, the propagation of a beam of a weakly guiding fibre laser through an optical ABCD system with a circular aperture at the fibre end is studied. The results show that there is muchdifference between the propagation of the laser beam described by theexpansion expression and by the Gaussian mode approximation. The depth of focus of the laser beam is longer than that of the Gaussian modes. |
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| Keywords: | 42.55.Wd 42.81.Dp |
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