Abstract

We demonstrate that an optical vortex with fractional topological charge can be approximated as a linear combination of the two adjacent integer topological charges. This theory is experimentally verified utilizing a vortex grating spectrum analyzer, i.e., a computer-generated hologram with a charge 1 vortex grating. By extracting the intensity value of the center portion of the target diffraction orders, both the number and the sign of the topological charge of any input vortex can be identified and analyzed.

© 2010 Optical Society of America

Full Article  |  PDF Article
More Like This
Analysis of multilevel spiral phase plates using a Dammann vortex sensing grating

N. Zhang, Jeffrey A. Davis, Ignacio Moreno, Don M. Cottrell, and X.-C. Yuan
Opt. Express 18(25) 25987-25992 (2010)

Vortex strength and beam propagation factor of fractional vortex beams

Jisen Wen, Li-Gang Wang, Xihua Yang, Junxiang Zhang, and Shi-Yao Zhu
Opt. Express 27(4) 5893-5904 (2019)

Decomposition of radially and azimuthally polarized beams using a circular-polarization and vortex-sensing diffraction grating

Ignacio Moreno, Jeffrey A. Davis, Isaac Ruiz, and Don M. Cottrell
Opt. Express 18(7) 7173-7183 (2010)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (15)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics