Assembly system and method for electro-optic modulator module of cold atom interferometer laser system
A technology of electro-optical modulator and laser system, which is applied in the direction of lasers, phonon exciters, laser components, etc., can solve the problems of time-consuming and laborious, cumbersome and complicated installation and adjustment process, and no specific reference for temperature control point selection, so as to improve efficiency Effect
Active Publication Date: 2021-12-24
HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)
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[0006] The embodiment of the present invention provides a cold atom interferometer laser system electro-optic modulator module installation system and method, which is used to solve the problem of the traditional electro-optic modulator installation method where there is no specific reference for temperature control point selection and the installation and adjustment process is very cumbersome and complicated. time consuming defect
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[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0041] At present, the existing electro-optic modulator installation and adjustment methods are generally divided into the following two types: the first method is to consider only the electro-optic modulator does not condense and the temperature The temperature is set at a point slightly higher or lower than room temperature. However, the first ...
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The invention provides a system and method for installing and adjusting an electro-optic modulator module of a cold atom interferometer laser system, including an electro-optic modulator (20), an electro-optic modulator temperature control unit (30), a vector network analyzer (40) and an electro-optic modulator The modulator drives the signal source (80); the signal reflection intensity of the resonance point of the electro-optic modulator (20) is measured by a vector network analyzer (40) under different operating temperature conditions; the temperature at which the signal reflection intensity changes with the temperature with the smallest change is found by data fitting At this temperature, the modulation depth of the electro-optic modulator (20) is least sensitive to temperature changes. The invention effectively solves the problem of finding the best working temperature point of the electro-optic modulator in the cold atom interferometer, significantly improves the temperature stability of the modulation depth of the electro-optic modulator, and makes the carrier sideband ratio of the laser modulated by the electro-optic modulator stable. A substantial increase, thereby improving the long-term stability of the cold atom interferometer.
Description
technical field [0001] The invention relates to the field of cold atom interference precision measurement, in particular to an assembly system and method for an electro-optic modulator module of a laser system of a cold atom interferometer. Background technique [0002] Cold atom interferometry technology has developed rapidly in the past 20 years, and it has been widely used in precision measurement physics and fundamental physics research, and has achieved fruitful results. In the field of precision measurement, high-precision measurement of gravity acceleration, gravity gradient, earth rotation and other inertial quantities has been realized by using cold atom interferometry technology. [0003] The basic working principle of the cold atom interferometer is: cold atomic groups interfere under the action of the π / 2-π-π / 2 Raman laser pulse sequence; the acceleration of gravity deflects the interference path of the cold atomic groups, so that the atoms feel the pull The rel...
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IPC IPC(8): G01M11/00G01R23/02G01R31/00H01S3/00H01S3/10
CPCG01R31/00G01R23/02G01M11/00H01S3/0085H01S3/10061
Inventor 陈福胜沈楚洋宋宏伟毛海岑刘和平
Owner HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)