Propagation properties of the circular Airy beam with a Gaussian envelope in Fourier space

Author(s):

Tao Geng and Xiuxiang Zhang

Abstract:

“We theoretically and experimentally study the propagation properties of the circular
Airy beam (CAB) with a Gaussian envelope in Fourier space. The two parameters of the Gaussian
function can be used to control the distribution of the spatial frequency, and thus to tune the
propagation properties of this modified CAB. When the two parameters are chosen appropriately,
the size of focal spot will be reduced, the maximum focal intensity and especially the abruptly
autofocusing property will be greatly enhanced. Meanwhile, the focal position can remain almost
the same with the common CAB. The experimental results show that the proposed beam can
be generated conveniently by using the same Fourier transform method as used to generate the
common CAB.”

Link to Publications Page

Publication: Optics Express

Issue/Year/DOI: Vol. 28, Issue 2, pp. 2447-2455
DOI: 10.1364/OE.384143

Wavefront-shaping-based correction of optically simulated cataracts

Author(s):

Augusto Arias and Pablo Artal

Abstract:

“Cataracts is a common ocular pathology where the crystalline lens tends to become opaque, degrading the quality of the retinal images because of the increase of both aberrations and scattering. In this work, we simultaneously generated and optically corrected the effects of cataracts in an optical bench by using a liquid crystal device spatial light modulator. The correction was carried out by implementing a feedback-based wavefront shaping technique with different spatial resolutions of the corrector phase maps. Its benefits were evaluated through objective and subjective descriptors of the quality of vision. The analysis of the experimental results, in addition to numerical calculations of the uncorrected and corrected ocular point spread functions, allowed us to understand the limitations of the technique and to present a strategy to overcome it for future in vivo applications.”

Link to Publications Page

Publication: Optica

Issue/Year/DOI: Vol. 7, Issue 1, pp. 22-27
DOI: 10.1364/OPTICA.7.000022