Photoelectric integration electric-field sensor based on period polarized ferroelectric crystal

A periodically polarized, ferroelectric crystal technology, used in electrostatic field measurement, voltage/current isolation, etc., can solve the problem that the temperature stability has not yet reached the best, and achieve excellent temperature stability, convenient laboratory measurement, and response speed. quick effect

Inactive Publication Date: 2009-07-29
TSINGHUA UNIV
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Problems solved by technology

The ferroelectric crystal materials they use have locally reversed the electric domain in the M-Z structure ...

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  • Photoelectric integration electric-field sensor based on period polarized ferroelectric crystal
  • Photoelectric integration electric-field sensor based on period polarized ferroelectric crystal
  • Photoelectric integration electric-field sensor based on period polarized ferroelectric crystal

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Embodiment Construction

[0020] The photoelectric integrated electric field sensor based on the periodic poled ferroelectric crystal that the present invention proposes is described in detail as follows in conjunction with accompanying drawing and embodiment:

[0021] The structure of the photoelectric integrated electric field sensor based on the periodic poled ferroelectric crystal proposed by the present invention is as follows: figure 2 or image 3 As shown, the sensor includes a periodically polarized ferroelectric wafer 1 with electro-optical effect (the short arrow marked with the letter Z in the figure indicates the direction of the electric domain where the arrow is located), forming The optical waveguide 2 of the Mach-Zehnder interferometer structure (M-Z structure) along the direction parallel to the domain wall, the optical waveguide includes an input section, an output section and an intermediate section composed of two parallel arms; the optical waveguide The two arms of are located in...

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Abstract

The invention relates to an integrated photovoltaic electric field sensor based on a periodically polarized ferroelectric crystal and belongs to the electric field measurement technology field. The integrated photovoltaic electric field sensor based on the periodically polarized ferroelectric crystal comprises a periodically polarized ferroelectric crystal with electro-optic effect, and an optical waveguide which is formed within one or more polarized periods on the surface of the crystal along the direction parallel to a domain wall and has a Mach-Zehnder interferometer structure; the optical waveguide comprises an input section, an output section and a middle section which is formed by two parallel arms; and the two arms of the optical waveguide are respectively positioned in an area with the polarization direction opposite in one or more polarized periods. In the periodically polarized ferroelectric crystal, the polarized periods are distributed on the whole chip. The invention can significantly improve the temperature stability of the existing integrated photovoltaic electric field sensor, further reduces the influence of the electric field sensor on the electric field to be measured, and simultaneously combines all the other advantages of the existing integrated photovoltaic electric field sensor.

Description

technical field [0001] The invention belongs to the technical field of electric field measurement, and in particular relates to a photoelectric integrated electric field sensor based on a periodically polarized ferroelectric crystal, which is especially suitable for isolation and strong electric field measurement under the condition of high electric field amplitude. Background technique [0002] In high voltage or electromagnetic pulse environments, very strong electric fields can be generated. The key component to measure it is the electric field sensor. The sensor must not only be able to withstand a strong electric field with a high amplitude, but also be able to measure it; in order to measure accurately, it is also required that the electric field to be measured has little influence. [0003] In the field of high-voltage engineering electric field measurement, the sensor of the traditional electromagnetic induction principle has a large size and a metal structure as a ...

Claims

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Application Information

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IPC IPC(8): G01R15/24G01R29/12
Inventor 李欢曾嵘王博余占清何金良
Owner TSINGHUA UNIV
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