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Title: Split in phase singularities of an optical vortex by off-axis diffraction through a simple circular aperture

Here, diffraction patterns of an optical vortex through several shaped apertures reveal its topological charge. In this letter, we theoretically and experimentally show that diffraction of a Laguerre Gaussian beam through a circular aperture at an off-axis position can be used to determine the magnitude and sign of the topological charge. To our knowledge, this is the first time that a simple circular aperture has been used to detect orbital angular momentum of an incident optical vortex.
Authors:
 [1] ;  [2]
  1. National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki (Japan); Mississippi State Univ., Mississippi State, MS (United States)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
Report Number(s):
JLAB-ACC-17-2423; DOE/OR/23177-4080
Journal ID: ISSN 0146-9592; OPLEDP
Grant/Contract Number:
AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
Optics Letters
Additional Journal Information:
Journal Volume: 42; Journal Issue: 7; Journal ID: ISSN 0146-9592
Publisher:
Optical Society of America (OSA)
Research Org:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; apertures; diffraction; optical vortices; computer holography
OSTI Identifier:
1363080
Alternate Identifier(s):
OSTI ID: 1348968