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Circularly polarized beam splitter and manufacturing method thereof

A circularly polarized light and beam splitter technology, applied in the optical field, can solve the problems of small splitting ratio, complex structure, low efficiency, etc., and achieve the effect of easy integration and preparation, and simple structure

Inactive Publication Date: 2018-02-16
STATE GRID ZHEJIANG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problem that the polarization beam splitter in the prior art has a small beam splitting ratio, complex structure and low efficiency.

Method used

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  • Circularly polarized beam splitter and manufacturing method thereof
  • Circularly polarized beam splitter and manufacturing method thereof
  • Circularly polarized beam splitter and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as Figure 1 to Figure 3 As shown, a circularly polarized beam splitter provided by an embodiment of the present invention includes a substrate 10 and a spiral wire grid. Array distribution, wherein, the substrate 20 is provided with a conductive film 50, multiple groups of spiral wire grids are connected to the substrate 20 through the conductive film 50, each group of spiral wire grids includes 8 single spiral wire grids 20, and 8 single spiral wire grids 20 rotate have the same direction and are located on the same straight line, such as figure 2 As shown, and the initial rotation angles of eight single helical wire grids 20 increase sequentially by 22.5 degrees, the initial rotation angle of the first single helical wire grid in each group of helical wire grids is 0 degrees, and in each group of helical wire grids The initial rotation angle 30 of the first single helical wire grid 20 is 0 degrees, that is to say, the latter single helical wire grid 20 is rota...

Embodiment 2

[0050] This embodiment is similar to Embodiment 1, and the same parts will not be repeated. The difference between the two is that the diameter of the single helical wire grid 20 in this embodiment is 30 nm, and the distance between any two single helical wire grids 20 is 190 nm. . Such as Figure 7 with Figure 8 As shown, the wavelength range of circularly polarized light that can be transmitted by the circularly polarized beam splitter of this embodiment is 0.6-0.86 μm, the average transmittance of circularly polarized light is 77%, the splitting ratio is 1:0.029, and the splitting angle is 40 It is 24.7 degrees.

Embodiment 3

[0052] This embodiment is similar to Embodiment 1, and the same parts will not be repeated. The difference between the two is that in this embodiment, the diameter of the single spiral wire grid 20 is 30nm, and the distance between any two single spiral wire grids 20 250nm, such as Figure 9 with Figure 10 As shown, the wavelength range of circularly polarized light that can be transmitted by the circularly polarized beam splitter of this embodiment is 0.6-0.86 μm, the average transmittance of circularly polarized light is 86%, the splitting ratio is 1:0.029, and the splitting angle is 40 It is 19.3 degrees.

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Abstract

The invention relates to a circularly polarized light beam splitter and a manufacturing method thereof. The circularly polarized light beam splitter comprises a substrate and spiral wire gatings. A plurality of groups of spiral wire gatings are arranged on the substrate vertically and are distributed in an array. Each spiral wire gatings group includes eight single spiral wire gatings; and the eight single spiral wire gatings having identical rotation directions are arranged on the same straight line and the initial rotation angles of the eight single spiral wire gatings are increased successively by 22.5 degrees. The initial rotation angel of the first single spiral wire gating in each spiral wire gatings group is 0 degree. When circularly polarized light enters vertically from one side of the spiral wire gating array and two beams of light is transmitted from the other side of the beam splitter, one beam of transmitting light is transmitted according to an original direction and a light splitting angle is formed between the other beam of light and one beam of light. On the basis of the structure, the wavelength of circularly polarized light that is allowed to be transmitted by the circularly polarized light beam splitter can reach 0.6 to 0.86 microns, the transmittance of the circularly polarized light can reach 86%, the splitting ratio can reach 1:0.0029, and the splitting angle can reach 24.7 degrees.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a circularly polarized beam splitter and a manufacturing method thereof. Background technique [0002] Optical beam splitter is an important component in the field of optics. It has been widely used in polarization splitting, optical fiber communication, photoelectric detection and other fields. [0003] At present, in the field of optics, the common polarizing beam splitter is a crystal birefringent beam splitter. Its working principle is: when the light beam passes through the interface of two glued crystal materials, one beam of polarized light is refracted along the original direction of propagation, and the other beam of polarized light is reflected along a direction close to 90 degrees, and finally two beams of polarization with different transmission directions are formed. Light. The disadvantages of this structure are very obvious: (1), due to the refraction of the bea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/28
CPCG02B27/283
Inventor 汤亿则徐志强黄红兵郑伟军毛秀伟贺琛彭瑶郑宁华何东章振海杨德明叶君华刘黎军王铭乐俊伟马骁李勃谷丰强马静雅曾次玲梁野陈贵凤高明慧马力陈茂源田东博杨军刘立国王娇罗海青建佳宜
Owner STATE GRID ZHEJIANG ELECTRIC POWER