A Method of Generating Multiple High Power Column Vector Polarized Beams Based on a Helical Wave Plate
A helical wave and cylindrical vector technology, applied in optics, optical components, instruments, etc., can solve the problems of small radially polarized light energy, single type, limited application, etc., and achieve the effect of easy operation and control, simple structure and stable performance.
Active Publication Date: 2020-08-04
中国人民解放军陆军军官学院
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Problems solved by technology
[0006] Although the coherent polarization manipulation method can produce high-purity radially polarized light, it has high requirements for the stability and precision control of the experimental optical path, and the operation and control are complicated; Single, relatively low purity, limited application effect; radially polarized light energy generated by spatial light modulator or optical fiber is small, limited application
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[0047] The specific embodiments of the present invention are given in conjunction with the accompanying drawings, and the technical solutions of the present invention are described in detail.
[0048] like figure 1 As shown, the beam generating system includes a high-power laser 1, a λ / 2 wave plate 2, a horizontal analyzer 3, a lens group (including a first lens 4 and a second lens 5), a first λ / 4 wave plate 6, a spiral The wave plate 7 , the second λ / 4 wave plate 8 , the spiral phase plate 9 and the beam expander 10 . figure 1 The middle dashed solid line represents the left and right parts of the beam, reflecting the change of the beam in space. When the linearly polarized light of any polarization direction is incident, first adjust the polarization direction of the linearly polarized light through the λ / 2 wave plate 2, and then pass through the horizontal analyzer 3 to ensure that the horizontal linearly polarized beam is obtained. The λ / 2 wave plate 2 and the horizontal ...
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The invention discloses a method for generating a high-power cylindrical vector polarized light beam based on a helical wave-plate plate. High-power linearly polarized light in a random polarization direction is input, a lambda / 2 wave plate can be rotated to adjust the polarization direction of the linearly polarized light, the light is changed into horizontally linearly polarized light via a horizontal polarization analyzer, a light beam is amplified via a lens group, the horizontally linearly polarized light beam passes a first lambda / 4 wave plate, the helical wave-plate plate and a second lambda / 4 wave plate successively to generate a cylindrical vector polarized light beam, spatial phase compensation is realized via a helical phase plate, and synchronous cylindrical vector polarized light is generated. The light beam is zoomed out / in by a light beam zooming device according to practical requirements. According to the invention, the wave plates are combined with helical wave-plate plate to realize polarization state control, a damage threshold is high, the high-power cylindrical vector polarized light can be realized, the wave plates are rotated simply to generate different types of light beams, the structure is simple, control and operation are easy, and the stability is high.
Description
technical field [0001] The present invention relates to the technical field of spatially polarized beam shaping, in particular to a method for generating a variety of high-power column vector polarized beams based on a helical wave plate. The method converts high-power linearly polarized beams into high-power column vector polarized beams, such as : radially polarized light, angularly polarized light, phase-variable cylindrical vector polarized beam, high-order cylindrical vector polarized beam and vortex beam, etc. Background technique [0002] Cylindrical vector polarized light is a special vector polarized light, whose spatial polarization state distribution is not uniform, but has certain symmetry or similarity about the optical axis. Axisymmetric beams belong to a type of cylindrical vector polarized light, including radially polarized light, angularly polarized light, etc., and have unique optical properties and applications due to the axisymmetric distribution of thei...
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IPC IPC(8): G02B27/28
CPCG02B27/286
Inventor 祁俊力汪卫华张辉潘保国杨锦宏邓海飞周先院范炯单会会张连庆史博芦伟王辉杜昂
Owner 中国人民解放军陆军军官学院