Method and system for generating double-exponential Bessel Gaussian beam

A Gaussian beam, double-exponential technology, applied in optics, optical components, instruments, etc., can solve many problems such as inability to achieve, reduce the utilization rate of light energy consumption, and inability to control the amplitude of Bessel beams, and achieve the utilization rate of light source energy. High, easy-to-use effects
CN107621701APending Publication Date: 2018-01-23SUZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SUZHOU UNIV
Publication Date
2018-01-23

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Abstract

The invention relates to a method and a system for generating a double-exponential Bessel Gaussian beam, which is designed for realizing superposition of multiple Bessel Gaussian beams with differenttransverse wave vectors and specific amplitude. A linearly-polarized Gaussian beam firstly passes through a vortex phase plate, a phase factor is introduced to the linearly-polarized Gaussian beam, and a Gaussian vortex beam is generated; the Gaussian vortex beam then passes through an amplitude spatial light modulator which is loaded with at least two circular amplitude holograms, through regulating the transmittance of the circular amplitude hologram, the amplitude of the Gaussian vortex beam (the double-exponential Bessel Gaussian beam) is further regulated, and a double-exponential BesselGaussian beam angular spectrum function is generated; and finally, Fourier transform is carried out to generate the double-exponential Bessel Gaussian beam. The double-exponential Bessel Gaussian beamsuperposition flexibility is higher, and the operation of generating the double-exponential Bessel Gaussian beam is simple.
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Description

technical field

[0001] The invention relates to a method and system for generating double-exponential Bessel Gaussian beams. Background technique

[0002] Since Durnin proposed and experimentally generated Bessel beams, a great deal of work has been devoted to studying this particular beam because of its two main properties, non-diffraction and self-healing. These characteristics make Bessel beams have important applications in particle acceleration, medical imaging, material detection, optical micromanipulation, optical trapping and other fields. Since the ideal Bessel beam has an infinite radial direction and carries infinite energy, the ideal Bessel beam cannot be produced in physics, so only approximate Bessel beams can be produced in the experiment. These approximate Bessel beams can have the main characteristics of Bessel beams in a fairly long propagation distance, and Bessel Gaussian beams are one of them, and they are also very easy to produce experimentally. Expe...

Claims

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