Laser beam shaping control system for forming optical trap

Abstract

The invention provides a laser beam shaping control system for forming an optical trap. The laser beam shaping control system for forming the optical trap comprises a laser light source unit, a laser beam combining gating unit and a laser modulation unit. The laser beam combining gating unit comprises a first reflector, a dichroic mirror, a second reflector and an acousto-optic tunable filter. The laser modulation unit comprises a liquid crystal spatial light modulator, a first relay lens, a hollow aperture, a second relay lens and a liquid crystal phase variable retarder. The laser beam shaping control system for forming the optical trap can modulate the wavelength, the power, the amplitude, the phase and the polarization state of laser simultaneously, achieve subtle and sophisticated shaping of laser beams, provide the light source which is needed for controlling micro matter and meanwhile give consideration on microscopic lighting and fluorescence excitation, thereby facilitating operation and component analysis on biological samples or particles.

Description

technical field [0001] The invention relates to the field of laser beam design, in particular to a laser beam shaping control system for forming an optical potential well. Background technique [0002] The research on the form and law of microscopic matter motion has always been a hot spot in the fields of physics and biology. On the microscopic scale, manipulating microscopic substances including biological cells, free electrons, atoms and molecules has always been a dream of human beings. At present, in the field of condensed matter physics, most of them rely on scanning tunneling microscopes to move and control atoms, but they cannot separate from the sample surface to capture atoms and molecules. Combining laser cooling with optical potential wells can break through the limitations of scanning tunneling microscopy and combine into new molecules or condensed matter, becoming the most promising microscopic material manipulation technology. In the field of biomedicine, th...

AI Technical Summary

Problems solved by technology

The amplitude, phase and polarization state of the laser can all affect the spatial distribution of the beam. At present, researchers at home and abroad mostly modulate a single parameter, and the shape of the formed beam is relatively simple, which limits its application in the field of basic research.

The joint modulation of amplitude, phase and polarization can precisely control the spatial distribution of the beam and form complex beam shapes, but there is no laser beam shaping system that can simultaneously modulate the three at home and abroad

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