Method for resetting optical grating for analclasis effect application

A photorefractive and photorefractive crystal technology, applied in optics, lasers, nonlinear optics, etc., can solve the problems of long response time and slow response speed, shorten the response time, solve the problem of long start-up time, automatic The effect of adapting light to heterodyne detection characteristics is not affected at all

Inactive Publication Date: 2005-02-16
XIDIAN UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to propose a preset grating method in the application of photorefractive effect, to solve the problem of slow response speed and long response working time of the existing photorefractive effect application system

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  • Method for resetting optical grating for analclasis effect application
  • Method for resetting optical grating for analclasis effect application
  • Method for resetting optical grating for analclasis effect application

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Embodiment Construction

[0046] The preset grating method of the present invention will be described in detail below with reference to the accompanying drawings:

[0047] refer to figure 1 , the self-pumping phase conjugate preset grating method of the present invention is carried out according to the following steps:

[0048] 1. Create a preset raster

[0049] If the wavelength of the preset light 1 is different from that of the signal light 5, as follows figure 1 As shown in (a), according to the characteristics of the photorefractive crystal and the incident angle θ and incident position x of the signal light 5, the incident angle and incident position of the preset light 1 relative to the photorefractive crystal PR1 are carefully adjusted to make it in the photorefractive state. A suitable self-pumping phase conjugate preset grating is established in the crystal PR1; if the wavelength of the preset light 1 is the same as that of the signal light 5, as figure 1 As shown in (b), the incident a...

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Abstract

The present invention relates to a preset grating method in photorefractive effect application. Said method includes the following steps: indifferent application systems setting preset laser, utilizing regulation of preset light produced by preset laser to create preset grating in photorefractive crystal; when requiring to work, closing the preset laser, at the same time introducing signal light into the application system; under the action of incident signal light and based on preset grating remained in the photofractive crystal signal light and based on preset grating remained in the photorefractive crystal said photorefractive crystal can utilize photorefractive effect to respectively implement different applicatios of self-pumping phase conjugation, mutually-pumping phase conjugationand photorefractive adaptive optical heterodyne detection in short time. Said invention an be extensively used in the fields of applied optics, optical communication, laser communication, radar and others.

Description

technical field [0001] The invention relates to the technical field of optics, in particular to a method for presetting gratings in the application of photorefractive effects, which can be used for photorefractive self-pumped phase co-conjugates in the fields of phase conjugate lasers, adaptive optics, optical communications and the like. The conjugation of the yoke and photorefractive mutual pumping phase can also be used for photorefractive adaptive optical heterodyne detection in the fields of laser communication, radar, heterodyne spectroscopy and laser gyroscope, as well as related application fields of photorefractive effect . Background technique [0002] As we all know, optical heterodyne detection technology has high detection sensitivity and signal-to-noise ratio compared with direct detection technology, so it is widely used in weak signal detection. However, according to the principle of optical heterodyne detection technology, in order to obtain effective optic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/03G02F1/35H01S3/00
Inventor 石顺祥李晓莉刘继芳李家立孙艳玲王晓颖
Owner XIDIAN UNIV
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