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Novel optical depolarizer

A depolarizer and optical technology, used in optics, optical components, light guides, etc., can solve the problems of increasing the production cost of hybrid devices and the large size of hybrid devices, and achieve the effects of increasing total energy, reducing volume, and reducing production costs.

Active Publication Date: 2015-07-01
ZHUHAI FTZ OPLINK COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] However, the thickness of the depolarization wave plate is set to be thick enough to meet the above depolarization requirements. For general birefringent crystals, such as yttrium vanadate crystals, the thickness needs to be set very long, which not only leads to a larger volume of the hybrid device, but also Will greatly increase the production cost of hybrid devices

Method used

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Examples

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no. 1 example

[0050] see Image 6 , the present embodiment has a light-combining isolation component and a depolarization component located at the light exit end of the light-combining isolation component, wherein the light-combining isolation component includes a polarizer 21, an optical rotation plate 22 and a polarizer 23, and the depolarization component includes a birefringent crystal 24, an extension Time slice 25 and birefringent crystal 26 . Wherein, the direction of the optical axis 21a of the polarizer 21 and the direction of the optical axis 23a of the polarizer 23 are viewed as an included angle of 45° along the light transmission direction.

[0051] The birefringent crystal 24 is a light-splitting element, and its optical axis 24a direction forms a certain angle with the top surface of the birefringent crystal 24. For example, if the birefringent crystal 24 is a yttrium vanadate crystal, the angle is 47.85°. The angle at which the ordinary light is separated during transmissio...

no. 2 example

[0080] This embodiment has a light-combining isolation component and a depolarization component, wherein the light-combining isolation component is the same as that of the first embodiment, and will not be described again. The principle diagram of the depolarization component of this embodiment is as follows Figure 10 shown.

[0081] The depolarization assembly is made up of polarization beam splitter 27, time delay plate 28 and polarization beam combiner 29, and wherein polarization beam splitter 27 is used for splitting polarized light, is the splitting element of the present embodiment, and polarization beam combiner 29 uses The light combining element of this embodiment is used to combine the light beams of the two optical paths. The time delay film 28 is located between the polarization beam splitter 27 and the polarization beam combiner 29 , and the time delay film 28 is located on an outgoing optical path of the polarization beam combiner 27 .

[0082] Two beams L51 a...

no. 3 example

[0098] see Figure 11 , the present embodiment has a light combination component and a depolarization component, the light combination component is a birefringent prism 31, and the depolarization component is composed of a birefringent crystal 34 as a light splitting element, a time delay plate 35, and a birefringent crystal 36 as a light combination element , the structure and working principle of the depolarization component are the same as those of the first embodiment, and will not be repeated here.

[0099] The birefringent prism 31 has two crystals 32, 33, wherein the optical axis of the crystal 32 and the optical axis of the crystal 33 are perpendicular to each other, that is, the optical axis of the crystal 32 and the optical axis of the crystal 33 form an included angle of 90°. And the projection of the optical axis of the birefringent crystal 34 on the exit surface of the crystal 33 forms an included angle of 45° with the optical axis of the crystal 33 . The birefri...

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Abstract

Methods, systems, and apparatus, for optical depolarization. One optical depolarizer includes a light-combining module comprising a birefringent prism, wherein an optic axis of a first crystal of the birefringent prism forms a 90° angle with an optic axis of a second crystal of the birefringent prism; and a depolarization module, wherein the depolarization module is disposed at a light emitting end of the light-combining module, the depolarization module comprising a light splitting component and a light-combining component disposed at an emitting end of the light-splitting component, and a delayer disposed between the light-splitting component and the light-combining component, wherein the delayer is disposed on an emitting optical path of the light-splitting component.

Description

technical field [0001] The invention relates to a novel optical device, in particular to a novel optical depolarizer for depolarizing polarized light. Background technique [0002] With the development of network communication, the data transmission speed of the optical fiber network is getting faster and faster, and the requirement for the capacity of the optical fiber network is also getting higher and higher. Most of the existing optical fiber networks transmit polarized light, and the resulting polarization-dependent loss, polarization-dependent gain and other interferences sensitive to polarized light affect the quality of optical fiber network transmission signals. Therefore, some existing optical fiber networks use optical depolarizers to depolarize polarized light, so as to change polarized light into unpolarized light. [0003] The common optical depolarizer is Lyot depolarizer, the structure of the depolarizer is as follows figure 1 shown. The Lyot depolarizer c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/28
CPCG02B27/286G02B6/2786G02B6/2746G02B6/272G02B5/30
Inventor 何冬玲赵泽雄潘鑫贺谭斌
Owner ZHUHAI FTZ OPLINK COMM
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