PMID- 37157503
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20230509
LR  - 20230509
IS  - 1094-4087 (Electronic)
IS  - 1094-4087 (Linking)
VI  - 31
IP  - 6
DP  - 2023 Mar 13
TI  - Coherence singularity and evolution of partially coherent Bessel-Gaussian vortex 
      beams.
PG  - 9308-9318
LID - 10.1364/OE.483647 [doi]
AB  - For a partially coherent Bessel-Gaussian (PCBG) vortex beam, information 
      regarding the topological charge (TC) is hidden in the phase of the 
      cross-spectral density (CSD) function. We theoretically and experimentally 
      confirmed that during free-space propagation, the number of coherence 
      singularities is equal to the magnitude of the TC. In contrast to the 
      Laguerre-Gaussian vortex beam, this quantitative relationship only holds for the 
      case with an off-axis reference point for the PCBG vortex beam. The phase winding 
      direction is determined by the sign of the TC. We developed a scheme for CSD 
      phase measurement of PCBG vortex beams and verified the aforementioned 
      quantitative relationship at different propagation distances and coherence 
      widths. The findings of this study may be useful for optical communications.
FAU - Zhu, Junan
AU  - Zhu J
FAU - Zhang, Hao
AU  - Zhang H
FAU - Wang, Zhuoyi
AU  - Wang Z
FAU - Zhao, Xuechun
AU  - Zhao X
FAU - Lu, Xingyuan
AU  - Lu X
FAU - Cai, Yangjian
AU  - Cai Y
FAU - Zhao, Chengliang
AU  - Zhao C
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Opt Express
JT  - Optics express
JID - 101137103
SB  - IM
EDAT- 2023/05/09 06:42
MHDA- 2023/05/09 06:43
CRDT- 2023/05/09 02:07
PHST- 2023/05/09 06:43 [medline]
PHST- 2023/05/09 06:42 [pubmed]
PHST- 2023/05/09 02:07 [entrez]
AID - 527042 [pii]
AID - 10.1364/OE.483647 [doi]
PST - ppublish
SO  - Opt Express. 2023 Mar 13;31(6):9308-9318. doi: 10.1364/OE.483647.