Angular motion measuring device based on nonlinear light wave beam splitting and beam combining

A measuring device and nonlinear technology, applied in the field of angular motion measuring devices, can solve problems such as difficulty in achieving ultra-high precision, and achieve the effect of achieving ultra-high sensitivity

Pending Publication Date: 2020-12-08
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology

In traditional interferometers, linear beam splitters and combiners are used to split and combine the incident light from the light source, but the process of splitting and combining beams of light follows energy conservation. For example, a 50:50 beam splitter, the incident light The frequency and strength of f 1 、A 1 , then the frequency and intensity of the two beams of light after passing through the beam splitter are both f 1 、A 1 / 2, that is, the traditional beam splitter has no amplification effect on the frequency, intensity and other characteristics of light, and the sensitivity of the interferometer based on this beam splitting and combining is limited by the standard quantum limit, and it is difficult to achieve ultra-high precision

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  • Angular motion measuring device based on nonlinear light wave beam splitting and beam combining

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Embodiment Construction

[0018] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0019] figure 1 It is a structural schematic diagram of an angular motion measurement device based on nonlinear optical beam splitting and beam combining pro...

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Abstract

The invention discloses an angular motion measuring device based on nonlinear light wave beam splitting and combining. The angular motion measuring device comprises a light source, a nonlinear beam splitter, a first circulator, a first modulator, an optical fiber ring, a second circulator, a second modulator, a nonlinear beam combiner and a detector. Nonlinear beam splitting is carried out on light source light, then the two beams of light pass through a symmetrical and uniform propagation path, the phase difference of the two beams of light is reduced to the maximum extent, measurement of theultrahigh sensitivity of the angular velocity of a carrier can be achieved, and the device has the characteristic of measuring extremely small angular velocity changes of the carrier and has the characteristic of breaking through the standard quantum limit (N is the average photon number of the incident end).

Description

technical field [0001] The invention belongs to the technical fields of nonlinear optics, quantum optics and precision measurement, and in particular relates to an angular motion measuring device based on nonlinear optical beam splitting and beam combining. Background technique [0002] Angular motion measurement devices are widely used in various fields such as aviation, navigation, and aerospace. In traditional interferometers, linear beam splitters and combiners are used to split and combine the incident light from the light source, but the process of splitting and combining beams of light follows energy conservation. For example, a 50:50 beam splitter, the incident light The frequency and strength of f 1 、A 1 , then the frequency and intensity of the two beams of light after passing through the beam splitter are both f 1 、A 1 / 2, that is, the traditional beam splitter has no amplification effect on the frequency, intensity and other characteristics of light, and the ...

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Application Information

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IPC IPC(8): G01P3/36
CPCG01P3/36
Inventor王巍桑建芝李明飞冯文帅李晶于海成
OwnerBEIJING INST OF AEROSPACE CONTROL DEVICES