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Light beam translation electric control device and method based on Goos-Hanchen displacement effect

A technology of beam translation and Gus-Hanchen, applied in the field of lasers, can solve the problems of high experimental conditions and environments for two-level atomic media, and difficulty in applying to general environments.

Inactive Publication Date: 2009-04-29
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The difficulty is that the two-level atomic medium has high requirements on experimental conditions and environments, and it is difficult to apply to general environments.

Method used

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  • Light beam translation electric control device and method based on Goos-Hanchen displacement effect
  • Light beam translation electric control device and method based on Goos-Hanchen displacement effect
  • Light beam translation electric control device and method based on Goos-Hanchen displacement effect

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Effect test

Embodiment 1

[0039] Such as figure 1 As shown, the electric beam translation control device based on the Gus-Hanchen displacement effect involved in this embodiment includes a prism 1, an upper metal film 2, a lithium niobate wafer 3, a lower metal film 4, an air gap 5, and a DC voltage source 6. The bottom surface of the prism 1 is coated with the upper metal film 2, and the lower surface of the lithium niobate wafer 3 is coated with the lower metal film 4. The bottom surface of the prism 1 is parallel to the surface of the lithium niobate wafer 3, and the two are rigidly fixed by a metal bracket. There is an air gap 5 between the lithium niobate wafers 3, forming a double-sided metal-clad waveguide structure composed of an upper metal film-air gap-lithium niobate wafer-lower metal film. The upper metal film 2 and the lower metal film 4 are coated with The electrodes are externally connected to a DC voltage source 6 .

[0040] The upper metal film 1 is made of gold or silver, with a thic...

Embodiment 2

[0046]The beam translation electric control method based on the Gus-Hanchen displacement effect involved in this embodiment takes a wavelength of 860 μm as an example. At this wavelength, the optical refractive index of lithium niobate o is 2.392, and the electro-optic coefficient is γ 13 =8.27pm / V, the piezoelectric coefficient is d 33 =8pm / V.

[0047] In the first step, two layers of metal films 2 and 4 are respectively plated on the bottom surface of a polished prism 1 and the lower surface of a lithium niobate wafer 3, and the bottom surface of the prism 1 is adjusted to be parallel to the surface of the lithium niobate wafer 3, and the two are connected by a metal support. Rigidly fixed, there is an air gap 5 between the prism 1 and the lithium niobate wafer 3, forming a double-sided metal-clad waveguide structure composed of an upper metal film-air gap-lithium niobate-lower metal film.

[0048] In the second step, the light beam is incident on the upper metal film 2 on ...

Embodiment 3

[0055] The beam translation electric control method based on the Gus-Hanchen displacement effect involved in this embodiment takes a wavelength of 860 μm as an example. At this wavelength, the optical refractive index of lithium niobate o is 2.392, and the electro-optic coefficient is γ 13 =8.27pm / V, the piezoelectric coefficient is d 33 =8pm / V.

[0056] In the first step, two layers of metal films 2 and 4 are respectively plated on the bottom surface of a polished prism 1 and the lower surface of a lithium niobate wafer 3, and the bottom surface of the prism 1 is adjusted to be parallel to the surface of the lithium niobate wafer 3, and the two are connected by a metal support. Rigidly fixed, there is an air gap 5 between the prism 1 and the lithium niobate wafer 3, forming a double-sided metal-clad waveguide structure composed of an upper metal film-air gap-lithium niobate-lower metal film.

[0057] In this embodiment, gold is selected as the metal material, the refractive ...

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Abstract

The invention relates to a electric control device for beam translation based on Goos-Hanchen shift effect and a method thereof, and belongs to the technical field of laser control. A bottom surface of a prism and a lower surface of a lithium niobate wafer of an electro optic material are respectively plated with metal films, and the bottom surface of the prism and the surface of the lithium niobate wafer are adjusted to parallel and fixed by a metal bracket so as to form a wave guide double surfaces of which are clad by metal; and the wave guide is composed of an upper metal film, an air gap, the lithium niobate wafer and a lower metal film. When laser is emitted on the surface of the wave guide, the laser is coupled into a wave guiding layer to excite lateral shift of guided-mode resonance enhanced reflected light when a phase matching condition is satisfied. The upper metal film and the lower metal film are plated with electrodes and connected with an external DC voltage source, and the voltage is adjusted; parameters of the wave guiding layer are changed by electro optic effect and piezoelectric effect of the lithium niobate, which causes Goos-Hanchen shift change of the reflected light and further realizes control on the beam translation. The electric control device and the method thereof can achieve high stability and high precision of the beam translation control, and can be applied to general environments.

Description

technical field [0001] The present invention relates to a device and method in the field of laser technology, in particular to an electrical control device and method for beam translation based on the Gus-Hanchen displacement effect. Background technique [0002] Beam translation control is widely used in the fields of industrial processing and information storage. With the development of laser applications and technological innovation, the high-frequency and high-precision control of laser beams has become an indispensable part of laser applications. Beam movement control is generally carried out by mechanically moving the light source in the field of industrial processing. The method is simple and intuitive, and the beam movement is directly realized by controlling the mechanical transmission. However, the disadvantage of this method is also obvious, the vibration noise is often relatively large, and the processing precision is greatly limited. In the field of information...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/03G02F1/035
Inventor 王毅曹庄琪李红根沈启舜
Owner SHANGHAI JIAO TONG UNIV
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