RUS  ENG JOURNALS   PEOPLE   ORGANISATIONS   CONFERENCES   SEMINARS   VIDEO LIBRARY   PACKAGE AMSBIB
General information
Latest issue
Archive

Search papers
Search references

RSS
Latest issue
Current issues
Archive issues
What is RSS



Computer Optics:
Year:
Volume:
Issue:
Page:
Find






Personal entry:
Login:
Password:
Save password
Enter
Forgotten password?
Register


Computer Optics, 2017, Volume 41, Issue 1, Pages 22–29 (Mi co354)  

OPTO-IT

Fractional orbital angular momentum of a Gaussian beam with an embedded off-axis optical vortex

V. V. Kotlyarab, A. A. Kovalevab, A. P. Porfirevab, E. G. Abramochkinc

a Image Processing Systems Institute of the RAS - Branch of the FSRC "Crystallography and Photonics" RAS, Samara, Russia
b Samara National Research University, Samara, Russia
c Samara Branch of P.N. Lebedev Physical Institute of Russian Academy of Sciences, Samara, Russia

Abstract: We theoretically and experimentally study asymmetric Gaussian optical vortices generated via diffracting a Gaussian beam by an off-axis spiral phase plate or amplitude "fork" hologram. It is shown that depending on the magnitude of the off-axis shift the laser beam can acquire a crescentshaped cross-section, which rotates on propagation. We obtain an analytical expression for the orbital angular momentum (OAM) of such a beam, which appears to be fractional. We show that with increasing off-axis shift, the OAM decreases parabolically. The experimental results are in qualitative agreement with theory and numerical simulation.

Keywords: fractional orbital angular momentum, Gaussian beam, optical vortex, spiral phase plate

Funding Agency Grant Number
Ministry of Education and Science of the Russian Federation -9498.2016.9
-2390.2017.2
Russian Foundation for Basic Research 15-07-01174-a
15-47-02492-__
16-29-11698-_
16-47-630483-a
The work was partially funded by the Russian Federation Ministry of Education and Science, Presidential grants for support of leading scientific schools (NSh-9498.2016.9) and young candidates of sciences (-2390.2017.2) and the Russian Foundation of Basic Research Grants (15-07-01174, 15-47-02492, 16-29-11698, 16-47-630483).


DOI: https://doi.org/10.18287/2412-6179-2017-41-1-22-29

Full text: PDF file (787 kB)
Full text: http://www.computeroptics.smr.ru/.../410103.html
References: PDF file   HTML file

Received: 30.12.2016
Accepted:09.02.2017

Citation: V. V. Kotlyar, A. A. Kovalev, A. P. Porfirev, E. G. Abramochkin, “Fractional orbital angular momentum of a Gaussian beam with an embedded off-axis optical vortex”, Computer Optics, 41:1 (2017), 22–29

Citation in format AMSBIB
\Bibitem{KotKovPor17}
\by V.~V.~Kotlyar, A.~A.~Kovalev, A.~P.~Porfirev, E.~G.~Abramochkin
\paper Fractional orbital angular momentum of a Gaussian beam with an embedded off-axis optical vortex
\jour Computer Optics
\yr 2017
\vol 41
\issue 1
\pages 22--29
\mathnet{http://mi.mathnet.ru/co354}
\crossref{https://doi.org/10.18287/2412-6179-2017-41-1-22-29}


Linking options:
  • http://mi.mathnet.ru/eng/co354
  • http://mi.mathnet.ru/eng/co/v41/i1/p22

    SHARE: VKontakte.ru FaceBook Twitter Mail.ru Livejournal Memori.ru


    Citing articles on Google Scholar: Russian citations, English citations
    Related articles on Google Scholar: Russian articles, English articles
  • Computer Optics
    Number of views:
    This page:508
    Full text:79
    References:31

     
    Contact us:
     Terms of Use  Registration  Logotypes © Steklov Mathematical Institute RAS, 2020