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Electronically controlled continuously graded index electro-optic crystal deflector

A graded index of refraction, electro-optical deflection technology, applied in instruments, optics, nonlinear optics, etc., can solve the problems that light waves cannot form diffraction deflection at the same time, and the incident angle has requirements, achieving simple structure, continuously adjustable deflection angle, electrical Good control performance

Active Publication Date: 2017-02-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing acousto-optic diffraction deflector has requirements for the incident angle of the light beam, and the light waves of different wavelengths incident at the same angle cannot form diffraction deflection at the same time, and provides an electronically controlled continuously graded refractive index electro-optic crystal deflector

Method used

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  • Electronically controlled continuously graded index electro-optic crystal deflector
  • Electronically controlled continuously graded index electro-optic crystal deflector
  • Electronically controlled continuously graded index electro-optic crystal deflector

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specific Embodiment approach 1

[0038] Specific implementation mode one: the following combination Figure 1 to Figure 6 Describe this embodiment mode, the electro-optic crystal deflector of electronically controlled continuous graded-refractive index described in this embodiment mode is characterized in that it includes an electro-optic deflection crystal 1 and an applied voltage 2,

[0039] The electro-optic deflection crystal 1 is a paraelectric-phase electro-optic crystal, which is obtained by cutting along the growth direction of the paraelectric-phase electro-optic crystal. The paraelectric-phase electro-optic crystal is a crystal whose components are continuously changed along the growth direction grown by the top seed crystal co-solvent method;

[0040] Place the electro-optic deflection crystal 1 in the optical path to be deflected, so that the incident light beam is perpendicular to the surface of the electro-optic deflection crystal 1, the incident direction of the incident light beam is perpendicu...

specific Embodiment approach 2

[0043] Specific embodiment two: This embodiment will further illustrate the first embodiment, the electro-optic deflection crystal 1 is potassium tantalum niobate KTa with a gradient distribution of the secondary electro-optic coefficient 1-x Nb x o 3 Electro-optic crystal, the gradient distribution interval of its quadratic electro-optic coefficient is 0.96×10 -15 m 2 V -2 ~2.70×10 -15 m 2 V -2 , the change range x of the composition niobium Nb along the growth direction is 0.359~0.371.

specific Embodiment approach 3

[0044] Specific implementation mode three: this implementation mode will further illustrate the second embodiment mode, and the electro-optic deflection crystal 1 adopts K 2 CO 3 、 Ta 2 o 5 and Nb 2 o 5 According to the molar ratio of 1.04:0.32:0.68, the raw materials with a total mass of 100g are prepared and grown. The size of the electro-optic deflection crystal 1 in the shoulder growth stage is 11.80mm×11.80mm in the vertical pulling direction, and the cooling rate in the equal diameter growth stage is The temperature is 0.4°C / h, and the gradient distribution of its component niobium Nb is 0.0031 / mm.

[0045] Potassium tantalum niobate KTa in this embodiment 1-x Nb x o 3 , KTN for short; the gradient distribution of the component niobium Nb is 0.0031 / mm, that is, the Curie temperature gradient is 2°C / mm.

[0046] The electro-optic deflection crystal 1 realizes the component distribution by controlling the weight of melted raw materials, the volume of grown crystals...

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Abstract

The invention discloses an electric control continuous gradual change refractive index electro-optical crystal defector, and belongs to the technical field of electro-optical defectors. The problems that an existing acousto-optical diffraction type deflector has requirements for the incident angles of light beams, and incident light waves with different wave lengths from the same angle cannot form diffraction deflection at the same time are solved. Electro-optical defection crystals are placed into a light path to be defected, an incident light beam is vertically incident into the surfaces of the electro-optical defection crystals, and the incident direction of the incident light beam is perpendicular to the growth direction of the electro-optical defection crystals. Impressed voltages are applied in the direction perpendicular to the growth direction of the electro-optical defection crystals, so that the electro-optical defection crystals are in gradual change refractive index graded distribution in the growth direction, hence, the equiphase surface of light waves inside the electro-optical defection crystals deflects, and light beam direction deflection can be achieved at the output end. The electric field direction of the impressed voltages is perpendicular to the incident direction of the light beam. The electric control continuous gradual change refractive index electro-optical crystal defector serves as an electro-optical crystal defector.

Description

technical field [0001] The invention relates to an electro-optic crystal deflector with an electrically controlled continuous graded refractive index, and belongs to the technical field of electro-optic deflectors. Background technique [0002] In many fields such as optical information communication, optical image processing, signal processing, etc., the deflector is one of the basic optical functional components, and it is widely used. The traditional deflector uses a combination of mechanical rotation and reflection system to achieve the deflection of the beam. It has the disadvantages of complex structure and large volume, which cannot meet the requirements of miniaturization and integration of the system. At the same time, its deflection rate is slow and the physical inertia is large. High-speed continuous reverse deflection of the beam. The acousto-optic diffraction deflector uses the standing wave formed by the acoustic wave in the material to periodically modulate t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/29
Inventor 田浩周忠祥姚博谭鹏
Owner HARBIN INST OF TECH
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