TY - JOUR
T1 - Detection uncertainty of fractional optical vortex with angle indeterminacy in different transformation-based OAM-sorting systems
AU - Shangguan, Huangcheng
AU - Zheng, Shuiqin
N1 - KAUST Repository Item: Exported on 2021-06-21
Acknowledged KAUST grant number(s): BAS/1/1614-01-01, OSR-CRG2017-3417
Acknowledgements: This work was supported by King Abdullah University of Science and Technology (BAS/1/1614-01-01, OSR-CRG2017-3417), Postgraduate innovation development fund project of Shenzhen University (315-0000470506).
PY - 2021/6/17
Y1 - 2021/6/17
N2 - This paper reveals and compares the detection uncertainty of fractional optical vortex (FOV) in several coordinate transformation-based OAM sorting systems. It is found that the azimuth of the phase mutation of FOV will significantly affect the output results. Hence, there will be a detection uncertainty when analyzing FOV with angle indeterminacy, but this uncertainty is not come from the FOV itself, but from the OAM sorting system. Therefore, FOV with angular uncertainty could be a tool to evaluate the robustness of the OAM sorting system. From the simulation and comparison, the features of the earliest proposed log-polar sorting method and the improved beam-copying, spiral-transformation sorting methods are studied. We conclude that the beam-copying sorting method is better for OAM spectrum analysis, and the spiral-transformation sorting with appropriate parameters performs better for average OAM detection.
AB - This paper reveals and compares the detection uncertainty of fractional optical vortex (FOV) in several coordinate transformation-based OAM sorting systems. It is found that the azimuth of the phase mutation of FOV will significantly affect the output results. Hence, there will be a detection uncertainty when analyzing FOV with angle indeterminacy, but this uncertainty is not come from the FOV itself, but from the OAM sorting system. Therefore, FOV with angular uncertainty could be a tool to evaluate the robustness of the OAM sorting system. From the simulation and comparison, the features of the earliest proposed log-polar sorting method and the improved beam-copying, spiral-transformation sorting methods are studied. We conclude that the beam-copying sorting method is better for OAM spectrum analysis, and the spiral-transformation sorting with appropriate parameters performs better for average OAM detection.
UR - http://hdl.handle.net/10754/669703
UR - https://linkinghub.elsevier.com/retrieve/pii/S014381662100172X
U2 - 10.1016/j.optlaseng.2021.106702
DO - 10.1016/j.optlaseng.2021.106702
M3 - Article
SN - 0143-8166
VL - 146
SP - 106702
JO - Optics and Lasers in Engineering
JF - Optics and Lasers in Engineering
ER -