Shaping algorithm used for amplitude, phase and polarization of any light beam, and light path thereof

A beam shaping and amplitude technology, applied in optics, optical components, instruments, etc., can solve problems such as the inability to control the amplitude, phase, and polarization state of a single phase photo, limited beam combination methods, and complex optical path construction.

Inactive Publication Date: 2019-08-13
CENT SOUTH UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

The existing algorithms and corresponding methods that can simultaneously shape the amplitude, phase, and polarization of the beam have some defects: the target beam must be expressed in mathematical expressions, the combination of the g...

Method used

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  • Shaping algorithm used for amplitude, phase and polarization of any light beam, and light path thereof
  • Shaping algorithm used for amplitude, phase and polarization of any light beam, and light path thereof
  • Shaping algorithm used for amplitude, phase and polarization of any light beam, and light path thereof

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Embodiment Construction

[0050] Such as figure 1 Shown is a method flow diagram of the method of the present invention: the shaping algorithm for the amplitude, phase and polarization of any light beam provided by the present invention includes the following steps:

[0051] S1. Set the beam shaping parameters; specifically include the constraint amplitude A of the beam input plane 0 , the initial phase P of the incident light 0 , the number of shaping iterations is N, and the initial phase of the incident light is randomly obtained; the number of shaping iterations is the pre-set condition described in step S7; the constraint amplitude A of the beam input plane 0 is planar or Gaussian;

[0052] S2. Calculate the complex amplitude of the input plane according to the parameters set in step S1; specifically, the complex amplitude of the input plane is A 0 ·exp(i·P 0 ); where A 0 is the confinement amplitude of the input plane of the beam, P 0 is the initial phase of the incident light, i is the ima...

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Abstract

The invention discloses a shaping algorithm used for the amplitude, the phase and the polarization of any light beam. The algorithm comprises the following steps that: setting a light beam shaping parameter; carrying out calculation to obtain the complex amplitude of an input plane and the complex amplitude of an output plane; decomposing target amplitude into components in two mutually vertical directions, and determining a phase difference in two directions; obtaining corrected complex amplitude and the input plane; outputting the phase of the final input plane as a pure phase hologram; andobtaining a target light beam. By use of the algorithm, the amplitude, the phase and the polarization state of any point in the light field can be controlled, and the light beam shaping of any shape,phase distribution and polarization state can be realized. Meanwhile, the pure phase hologram is obtained so as to be conveniently realized by a spatial light modulator or a manufactured diffracted light component and phase sheet, and the shaping of the amplitude and the phase of the light beam can be finished. The method is quick, has a good shaping effect, is suitable for light paths, and has asimple equipment instrument. Meanwhile, the light path provided by the invention has the advantages of being simple in arrangement and calibration.

Description

technical field [0001] In particular, the invention relates to a shaping algorithm for the amplitude, phase and polarization of an arbitrary light beam and its optical path. Background technique [0002] Traditional lasers can only produce light intensity beams with Gaussian profiles or specific profiles. In actual scientific research and production, different fields have different requirements for beam profile, polarization, and phase distribution. In recent decades, the shaping and research on the amplitude, phase and polarization state of laser beams have shown that purposeful shaping of beams can lead to new beam properties and applications. A spatial light modulator (SLM) is a device that can modulate the amplitude or phase of light waves. By loading a hologram on the SLM and modulating the wavefront of the incident beam to obtain a target beam with a specific amplitude, phase, and polarization distribution, complex manipulation of particles, nanowires, or organelles c...

Claims

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Application Information

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IPC IPC(8): G02B27/00G02B27/09
CPCG02B27/0012G02B27/09
Inventor 陶少华包栋杰
Owner CENT SOUTH UNIV
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