Spatial behavior of a vortex light beam produced by a diffraction grating with embedded phase singularity

Aleksandr Bekshaev; Aleksandr Karamoch

doi:10.1117/12.796449

22 April 2008 Spatial behavior of a vortex light beam produced by a diffraction grating with embedded phase singularity

Proceedings Volume 7008, Eighth International Conference on Correlation Optics; 700806 (2008) https://doi.org/10.1117/12.796449
Event: Eighth International Conference on Correlation Optics, 2007, Chernivsti, Ukraine

Abstract

A general study of beams produced by a computer-generated hologram representing a diffraction grating with fringe bifurcation is presented. Properties of output beams are considered in connection with violation of ideal geometrical conditions: the input beam shape variations, its shifts and inclinations with respect to the grating. The basic consequences are: (i) presence the "ripple" structure in both amplitude and phase distributions (especially in the nearfield zone) caused by diffraction on the phase singularity (bifurcation point); (ii) in contrast to usual Gaussian beams with exponential amplitude fall-off, diffracted beams demonstrate the power-law decay at the beam periphery; (iii) when the incident beam axis is shifted from the grating center, an output beam with off-axial optical vortex is formed whose spatial evolution tends to the pattern of self-similar rotation. Trajectories of featuring points of the generated optical-vortex beam show regular angular deviation from the nominal positions, which grow with the incident beam shift magnitude and with topological charge of the vortex produced.

Citation Download Citation

Aleksandr Bekshaev and Aleksandr Karamoch "Spatial behavior of a vortex light beam produced by a diffraction grating with embedded phase singularity", Proc. SPIE 7008, Eighth International Conference on Correlation Optics, 700806 (22 April 2008); https://doi.org/10.1117/12.796449

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Computer generated holography

Diffraction

Diffraction gratings

Wavefronts

Gaussian beams

Spiral phase plates

Beam propagation method

Show All Keywords

Keywords/Phrases

Search In:

Publication Years