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Optical depolarizer with high-polarization state space random distribution

A technology of chaotic distribution and polarization state, applied in optics, optical components, instruments, etc., can solve problems such as unfavorable applications, large optical power, uneven optical power, etc., and achieve improved depolarization quality, weakened strip-shaped distribution, The effect of improving the uniformity of spatial distribution

Inactive Publication Date: 2013-02-27
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In existing optical depolarizers, there is a problem of continuous strip-shaped distribution of polarization states in the space of the polarization state of the outgoing light. There is a relatively consistent polarization state in the strip-shaped area, which will cause excessive optical power in the area or If it is too small, the optical power between the regions in the beam plane will be uneven, which is not conducive to practical application

Method used

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  • Optical depolarizer with high-polarization state space random distribution
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  • Optical depolarizer with high-polarization state space random distribution

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Embodiment 1

[0050] like Figure 5 As shown, an optical depolarizer composed of three quartz crystals with high spatially disordered distribution of polarization states, the connecting optical system is: quartz crystal 51, quartz crystal 52, and quartz crystal 53, which are designed in the shape of a cuboid. With respect to the incident light direction, the front face of the quartz crystal 51 and the rear face of the quartz crystal 53 are perpendicular to the incident light, the front face and the rear face of the quartz crystal 52 are inclined in two mutually perpendicular directions, and the inclination angle is 4 degrees, and the crystals are mutually perpendicular to each other. Match and connect with optical glue. The optical axis directions of the three crystals are all perpendicular to the direction of the incident light, neither perpendicular nor parallel to each other, and relative to the optical axis direction of the first crystal, they are 0 degrees, 45 degrees, and 60 degrees i...

Embodiment 2

[0052] like Figure 7 As shown, four quartz crystals constitute a schematic diagram of the combined structure of this embodiment, Figure 8 It is a schematic diagram of the directions of the optical axes of the four crystals. In the figure, the first set of combined quartz crystals 71, 72, the angle θ between the fast axis and the y-axis of the quartz crystal 71 71 =0, the angle θ between the fast axis of the quartz crystal 72 and the y-axis 72 = π / 4. The front face of the quartz crystal 71 is perpendicular to the direction of the incident light, and the rear face is rotated and tilted around the x-axis; the front face of the quartz crystal 72 is attached to the rear face of the quartz crystal 71, and the rear face is perpendicular to the direction of the incident light. The second set of combined quartz crystals 73, 74 has the same structure as the first set of combined quartz crystals 71, 72, and rotates 30 degrees clockwise along the incident direction, and the angle bet...

Embodiment 3

[0055] like Figure 9 As shown, it is a schematic diagram of the overall combined structure of the present embodiment composed of six quartz crystals, Figure 10 It is a schematic diagram of the optical axis directions of six crystals.

[0056] The optical depolarizer composed of six quartz crystals with high polarization spatial disorder distribution is divided into two sets, each set of combined crystals includes three quartz crystals, and the connecting optical system is: quartz crystal 91, quartz crystal 92, quartz crystal 93, quartz crystal 94, quartz crystal 95, and quartz crystal 96 are designed in the shape of a cuboid. With respect to the incident light direction, the front end face of the quartz crystal 91 and the rear end face of the quartz crystal 93 are perpendicular to the incident light, the front end face and the rear end face of the quartz crystal 92 are inclined on two mutually perpendicular directions, and the inclination angle is 4 degrees, and the crystal...

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Abstract

The invention discloses an optical depolarizer with high-polarization state space random distribution. An incident surface is parallel to an emergent surface and is vertical to incident beams, and the optical depolarizer is characterized by consisting of more than three birefringent crystals in optical cement connection in turn, wherein an optical axis of each birefringent crystal is vertical to the incident beams, and an angle of 45 degrees is formed between optical axes of at least two adjacent birefringent crystals; at least two combining surfaces between the birefringent crystals are inclined surfaces, inclined directions of various inclined surfaces are different, and an angle of inclination is between 2 and 10 degrees. The optical depolarizer can reduce consistent distribution of polarization state strips of space beams. According to the depolarizer, the depolarized emergent light can make the polarization state in two-dimensional direction randomly changed in a light-transmitting plane, the strip distribution is obviously reduced, and the space distribution uniformity of the polarization state is effectively improved; therefore, the depolarization quality is improved.

Description

technical field [0001] The present invention relates to optical depolarizers. Background technique [0002] Light is an electromagnetic wave. In 1809, French engineer Marius discovered the polarization of light in an experiment. The study of the polarization phenomenon of light has given a new understanding of the law of light propagation. Especially in recent years, various polarizing elements, polarizing instruments and polarizing technology developed by utilizing the polarization of light have played an important role in modern science and technology. Many polarized light sources and polarizers have been invented and discovered, which can polarize unpolarized light and have been widely used in various fields of human life. However, in some cases polarized light can negatively affect the system. [0003] Some studies have been done on the influence of polarized light on the measurement accuracy of optical instruments, the quality of optical communication systems and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/28
CPCG02B27/286G02B5/3083
Inventor 陈哲葛菁华张军罗英达余健辉陈春艳
Owner JINAN UNIVERSITY
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