摘要
介绍了一种基于步进电机的光开关,主要用于间歇型原子钟。采用直径为6 mm的两相步进电机,结合不同形状的挡光叶片,实现了对光的开启与关断。采用步进电机驱动芯片TMC260和微控制器STC12C5A60S2结合的方式控制步进电机的转动。该控制系统整体结构紧凑,且一个微控制器可以控制多个步进电机。实验结果表明,利用该光开关可实现高于100 dB的消光比,并且可长时间稳定运行。
We describe an optical switch based on the stepper motor, which can be used to the pulsed atomic clocks. The switch consists of a two-phase stepper motor with 6 mm diameter and blades with different shapes to switch on and off the light. A universal stepper motor driver chip(TMC260) and a microcontroller(STC12C5A60S2) are used to control the rotation of the motors. The control system is compact. One microcontroller can be used to control multi-motors. The experimental results show that the extinction ratio higher than 100 dB is reached and the optical switches can work normally for a long term.
作者
于明圆
徐斌
欧阳鑫川
王鑫
万金银
肖玲
成华东
刘亮
Yu Mingyuan;Xu Bin;Ouyang Xinchuan;Wang Xin;Wan Jinyin;Xiao Ling;Cheng Huadong;Liu Liang(Key Laboratory of Quantum Optics,Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences, Beijing 100049, China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2019年第8期146-150,共5页
Chinese Journal of Lasers
基金
国家自然科学基金(11604353,61875215,61727821)
关键词
光开关
步进电机
消光比
原子钟
optical switch
stepper motor
extinction ratio
atomic clock
