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Acousto-optic modulator

An acousto-optic modulator with a smooth surface technology, which is applied in the directions of instruments, optics, nonlinear optics, etc., can solve the problems of low modulation speed and narrow application range, and achieve the effect of wide working frequency band, small thickness and high response speed

Active Publication Date: 2020-06-05
GUIZHOU MINZU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modulation speed of traditional acousto-optic modulators is low, and it is mainly used in fields such as printers and laser engraving that do not require high modulation speeds.
Traditional acousto-optic modulators can only respond well to sound waves and light in a specific frequency range, and their application range is narrow. The main reason is that traditional acousto-optic modulation mainly uses the resonance of sound waves and the diffraction of light, which needs to meet resonance or diffraction and interference conditions. can only occur at certain frequencies

Method used

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Embodiment 1

[0029] Such as figure 1 As shown, in this embodiment, an acousto-optic modulator includes a base 1, a vertical cylindrical lubricating layer 2 is fixed on the base 1, the lubricating layer 2 is hollow, and the base 1 covers the bottom of the lubricating layer 2. The upper surface of the lubricating layer 2 is provided with a two-dimensional material 3, and the two-dimensional material 3 covers the top opening of the lubricating layer 2. The base 1, the lubricating layer 2 and the two-dimensional material 3 form a closed gas chamber, and the gas chamber The filled gas is nitrogen, which has good stability, does not easily react with the two-dimensional material 3, the lubricating layer 2 and the base 1, and has good air tightness.

[0030] The lubricating layer 2 has a cylindrical and hollow structure. The outer wall of the lubricating layer 2 is provided with a plurality of radiating strips circumferentially fixed with a height of 500 nanometers, an outer diameter of 20 micrometer...

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Abstract

The invention discloses an acousto-optic modulator. The modulator comprises a base; a vertical cylindrical lubricating layer is fixedly arranged on the base; the lubricating layer is hollow, the baseseals and covers an opening in the bottom end of the lubricating layer, a two-dimensional material is arranged on the upper surface of the lubricating layer, the two-dimensional material seals and covers an opening in the top end of the lubricating layer, and the base, the lubricating layer and the two-dimensional material form a closed gas cavity. The beneficial effects of the invention are that:when sound waves are transmitted to the structure, the acoustic pressure enables the two-dimensional material to slide on the lubricating layer and changes the distance between the two-dimensional material and the conductive base so as to achieve acousto-optic regulation and control, the acousto-optic modulator is wide in working frequency band, acoustic signals from infrasonic waves to ultrasonic waves with the frequency of 10 GHz can be converted into optical signals within the ultraviolet-to-infrared spectral range, and the response speed is high.

Description

Technical field [0001] The invention relates to the field of acousto-optic technology, in particular to an acousto-optic modulator. Background technique [0002] Acousto-optic modulators have low driving power and excellent temperature stability. However, the traditional acousto-optic modulator has a low modulation speed and is mainly used in printers, laser engraving and other fields that do not require high modulation speed. Traditional acousto-optic modulators can only respond well to sound waves and light in a specific frequency range, and have a narrow application range. The main reason is that traditional acousto-optic modulation mainly uses the resonance of sound waves and the diffraction of light, which need to meet the conditions of resonance or diffraction and interference. It can only happen at a certain frequency. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide an acousto-optic modulator. When sound waves pr...

Claims

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Application Information

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IPC IPC(8): G02F1/11
CPCG02F1/11
Inventor 刘江涛黄金保杨盛毅王声权曲晓英蔡立
Owner GUIZHOU MINZU UNIV
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