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Design, transform and control of optical field in discrete optical system: an example.

Abstract：

:A discrete optical system can broaden the spatial distribution of the input light through optical coupling in array waveguides, just like diffraction in continuous media. Here, we theoretically demonstrate several kinds of control methods of optical field propagation in a discrete optical system, which is composed of an Airy fiber with two perpendicular arrayed cores. A brief transform mechanism between Gaussian and Airy beam propagation in such a fiber is presented. The wavefront of the output beam from the Airy fiber is actually dependent on the phased arrayed modulation of coupling array cores. Except the optical wavelength changing, we propose two new methods, including fiber length and bending-induced refractive-index changing, to accomplish that modulation. The calculation results show that these new methods are very effective for the Airy phase modulation. By combining these methods and controlling the corresponding parameters, the Gaussian beam, the one-dimension Airy beam, and the two-dimension Airy beam can be obtained by one same Airy fiber. These methods are also generally applicable to the other discrete optical system and can be extended to generate any other types of optical beams, such as Bessel beams and Mathieu beams.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Deng H,Yuan Y,Yuan L

doi

10.1038/s41598-017-05414-w

subject

Has Abstract

pub_date

2017-07-12 00:00:00

pages

5171

issue

1

issn

2045-2322

pii

10.1038/s41598-017-05414-w

journal_volume

7

pub_type

杂志文章

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