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Graphene based passive depolarizer and preparation method thereof

A technology of graphene and depolarizers, applied in instruments, polarizing components, optics, etc., can solve problems such as complex manufacturing process, high cost, and easy damage to the interface between components, and achieve the effect of wide adjustment range and strong adaptability

Inactive Publication Date: 2016-09-28
UNIV OF SHANGHAI FOR SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

[0004] The above-mentioned depolarizers are composed of two or more components, including wave plates or birefringent material components with relatively complex structures. The manufacturing process is complicated and the cost is high, and the structures of these components are relatively complex. Easily damaged, affect the use effect

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  • Graphene based passive depolarizer and preparation method thereof

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Embodiment

[0029] figure 1 A schematic structural diagram of a graphene-based passive depolarizer (hereinafter referred to as a passive depolarizer) provided by the present invention. like figure 1 As shown, the passive depolarizer 10 includes a laser focusing unit 100 and a polarization adjustment unit 200, wherein the polarization adjustment unit is a garnet film 201 grown with a graphene layer 202, and has a certain distance from the laser focusing unit 100 and the The distance can be adjusted manually or by motor. In this embodiment, the laser focusing unit 100 is a lens, and the distance between the laser focusing unit 100 and the polarization adjustment unit 200 is limited to 10-130 cm.

[0030] like figure 1 As shown, the incident laser light enters the passive depolarizer 10 from the left side, is focused by the laser focusing unit 100 and is projected to the polarization adjustment unit 200, and then passes through the polarization adjustment unit 200 to form an outgoing lase...

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Abstract

The invention provides a graphene based passive depolarizer which is used to adjust the polarization degree of laser. The depolarizer is characterized by comprising a condensation unit and a polarization adjustment unit, the polarization adjustment unit is arranged in an optical path of the condensation unit, and separated from the condensation unit; and the polarization adjustment unit includes a garnet film in which graphene grows. The invention also provides a method for preparing the passive depolarizer. The method is characterized in that the garnet film in which graphene grows is prepared via a chemical vapor deposition method, and serves as the polarization adjustment unit. According to the passive depolarizer provided by the invention, the distance between the condensation unit and polarization adjustment unit is adjusted to adjust the polarization degree of laser linearly, the adjustment range is wide, and the adaptability is high; and according to the preparation method of the passive depolarizer, preparation can be completed via common materials and fewer steps, the cost is low and preparation is easy.

Description

technical field [0001] The invention relates to a depolarizer in the optical field and a preparation method thereof, in particular to a graphene-based passive depolarizer and a preparation method thereof. Background technique [0002] In the optical system, many optical components are sensitive to the polarization state of the laser. The small changes of such optical components affected by the polarization state of the laser can easily lead to errors in the entire optical system. In this case, a depolarizer is required to adjust the laser the polarization state. [0003] A depolarizer, also known as a depolarizer, is an optical component that can adjust the degree of polarization of laser light and convert polarized light into unpolarized light. Depolarizers commonly used today have wave plates, or elements made of birefringent materials. For example, the Lyot depolarizer consists of two parallel birefringent material wave plates with a thickness ratio of 2:1, and the angl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B27/28
CPCG02B5/30G02B27/286
Inventor 沈杨帆克帕依吐·吐尔逊焦新兵
Owner UNIV OF SHANGHAI FOR SCI & TECH
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