Chao-Ying Zhao, Yu-Ting Fan, Yi-Chao Meng, Qi-Zhi Guo, Wei-Han Tan. Orbital angular momentum mode of cylindrical spiral wave-guide [J]. Acta Physica Sinica, 2020, 69(5): 054207-1
- Acta Physica Sinica
- Vol. 69, Issue 5, 054207-1 (2020)
Fig. 1. (a) Fiber propagation along cylindrical spiral wave-guide; (b) OAM light field distribution, (c) berry phase.
Fig. 2. (a) Path vector s P M 
,
.
,
. 
Fig. 3. There is no higher-order OAM mode in the cross section of the optical fibers propagating in a straight line, and the optical field distribution is a circular aperture diffraction spot.
Fig. 4. The optical fiber cross section propagating in cylin-drical shape has a high-order OAM mode with: (a)
; (b)
; (c)
; (d)
.
; (b)
; (c)
; (d)
. 
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