Auto-collimation spatial lithium niobate electro-optic phase modulator and preparation method thereof

An electro-optic phase modulation and lithium niobate technology, which is applied in instruments, optics, nonlinear optics, etc., can solve the problems of low temperature sensitivity and low optical signal intensity, achieve high modulation efficiency, reduce system complexity, Expand the effect of application scenarios

Active Publication Date: 2021-06-15
TIANJIN UNIV
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Problems solved by technology

[0004] In order to overcome the disadvantages of low optical signal intensity and low temperature sensitivity caused by optical loss in existing sensors, based on the above technical problems, the present invention proposes a self-collimating space-type lithium niobate electro-optic phase modulator and its The preparation method realizes a self-collimating spatial electro-optical phase modulator prepared by using gas phase transport balance technology

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  • Auto-collimation spatial lithium niobate electro-optic phase modulator and preparation method thereof
  • Auto-collimation spatial lithium niobate electro-optic phase modulator and preparation method thereof
  • Auto-collimation spatial lithium niobate electro-optic phase modulator and preparation method thereof

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Embodiment Construction

[0020] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] The principle that the present invention is based on is as follows: by adopting a certain method to change the refractive index of the near-surface region of the ingot under the electrode, a gradient distribution with a gradually decreasing refractive index from the inside of the ingot to the surface is formed. In the area where the refractive index gradually changes, the optical path will be bent, and the light beam will always tend to be deflected from the low refractive index area to the high refractive index area, and the light will automatically return to the inner core layer of the ingot from the near surface area of ​​the ingot. To achieve the effect of self-collimation. For example, when a Gaussian beam is incident on the inside of the ingot, the expression of the incident light is obtained fr...

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Abstract

The invention discloses an auto-collimation spatial lithium niobate electro-optic phase modulator and a preparation method thereof. The auto-collimation spatial lithium niobate electro-optic phase modulator comprises an electrode (1), magnesium-doped lithium niobate crystal near-surface refractive index gradient layers (2) and a high-refractive-index magnesium-doped lithium niobate crystal core layer (3), wherein the high-refractive-index magnesium-doped lithium niobate crystal core layer (3) is arranged between two poles of the electrode (1); the magnesium-doped lithium niobate crystal near-surface refractive index gradient layers (2) are arranged in a space formed by the high-refractive index magnesium-doped lithium niobate crystal core layer (3) and the electrode (1) in pairs. Compared with an existing lithium niobate space type electro-optic phase modulator, the lithium niobate space type electro-optic phase modulator has lower half-wave voltage, higher light intensity bearing capacity, lower transmission loss and higher modulation efficiency; the input light beam does not need to be collimated, the complexity of the system is reduced, the device can be directly connected with a large-core-diameter and large-mode-field optical fiber, and the application scene is expanded.

Description

technical field [0001] The invention relates to the technical field of electro-optic conversion, in particular to a self-collimating spatial electro-optic phase modulator. Background technique [0002] Laser cooling is a high-tech technology that uses the interaction between laser and atoms to slow down the movement of atoms to obtain ultra-low temperature atoms. Laser cooling has many applications, such as: atomic optics, atomic etching, atomic clocks, optical lattices, optical tweezers, high-resolution spectroscopy, and fundamental research on the interaction of light and matter, among others. In recent years, using laser to cool atoms to realize quantum computing is one of the most potential application scenarios in the future. In the process of realizing laser cooling, it is necessary to realize controllable phase modulation of multiple beams of light. This is the key link to achieve laser cooling. Therefore, the spatial phase modulator is an essential and important d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/03
CPCG02F1/0316G02F1/0338G02F1/03
Inventor 华平壤丁宁戎士铖
Owner TIANJIN UNIV
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