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Sagnac angular velocity measurement system and method

A measurement system and measurement method technology, applied in the field of optical and precision measurement systems, can solve problems such as inability to break through measurement accuracy, and achieve the effect of improving system signal-to-noise ratio and sensitivity, and improving sensitivity

Active Publication Date: 2016-01-27
EAST CHINA NORMAL UNIV
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Problems solved by technology

However, in the process of measuring angular velocity, the classical measurement method is limited by the uncertainty principle of quantum mechanics, so the measurement accuracy cannot break through the standard quantum limit (standard quantum limit, SQL)

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  • Sagnac angular velocity measurement system and method

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Embodiment Construction

[0028] The present invention will be further described in detail in conjunction with the following specific embodiments and accompanying drawings. The process, conditions, experimental methods, etc. for implementing the present invention, except for the content specifically mentioned below, are common knowledge and common knowledge in this field, and the present invention has no special limitation content.

[0029] In the Sagnac angular velocity measurement system of the present invention, the interaction medium unit may be atoms, ions, molecules or quantum dots in the ground state. The storage medium unit (10) of this embodiment is a pure 87 Rb atomic ensemble. figure 1 Shown is 87 Rb atomic energy levels and corresponding optical frequency diagram. Among them, 5 2 S 1 / 2 、5 2 P 1 / 2 、5 2 P 3 / 2 for 87 The fine structure of Rb atom, F=1, F=2 is the fine structure 5S 1 / 2 The hyperfine division of , its energy level difference is 6.8GHz. The dashed line shows 87 The v...

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Abstract

The invention discloses a Sagnac angular velocity measurement system and method based on light and matter nonlinear action process, and the measurement system includes an action media unit, a coherent light source, a polarization beam splitter, a half-wave plate, an optical fiber coil and a photoelectric detector. Coherent light (pump light and signal light) emitted by a laser is used as an initial incident signal, on the one hand, by the use of the light and matter nonlinear action process, phase and intensity correlation between the matter coherence and the pump light and signal light can be produced to realize the phase sensitive nonlinear process; and on the other hand, the light and matter nonlinear action process and Sagnac effect are combined to achieve the angular velocity measurement. From the nature of light and matter interaction, the Sagnac angular velocity measurement system can effectively improve the system signal noise ratio and angle measurement sensitivity, the measurement accuracy can breakthrough standard quantum limit (standard quantum limit, SQL) and reach Heisenberg limit (Heisenberg limit, HL), and the Sagnac angular velocity measurement system provides a new way for the development of high-precision angle measurement.

Description

technical field [0001] The invention relates to an optical and precise measurement system, in particular to a brand-new Sagnac angular velocity measurement system based on the nonlinear interaction process of light and matter. Background technique [0002] Inertial technology uses the principle of inertia to realize the measurement and control of motion physical attitude and motion trajectory. It is a general term for technologies such as inertial instrumentation, inertial stability, inertial navigation, inertial guidance, and inertial measurement. Carrier motion information perception technology with strong anti-interference characteristics is widely used in inertial navigation, guidance and control, positioning and orientation, attitude stabilization, and overload sensing of various types of motion carriers in the military and national economic fields. [0003] As the core component of the inertial system, the gyroscope is used to measure the angular velocity of the moving...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/72
CPCG01C19/72
Inventor 陈丽清吴媛张卫平冯啸天杨培玉李政军黎建敏包谷之
Owner EAST CHINA NORMAL UNIV
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