CAJ | 학술논문

为了对铯原子外态干涉仪的激光束精密控制，设计了一套适用于多种需求的激光频率和光强控制系统。该系统基于声光调制器，并集成了激光移频、光强稳定和光强调制等功能。首先，根据原子干涉仪的原理，提出对激光的要求和指标。接着，按照提出的要求设计了集成锁相频率合成器等硬件电路系统和LabVIEW软件控制系统。最后，对所开发的系统进行了实验测试。实验结果表明：系统的移频范围可控制在100～200 MHz；光强稳定性好，采用稳光系统后输出光强的波动减小为2％。设计的这套系统功能齐全，可靠有效，实现预期目标，满足原子干涉仪对光学系统的要求。另外此系统还可以应用到其他需要系统中，比如原子钟、原子干涉重力梯度仪等。
위료대색원자외태간섭의적격광속정밀공제，설계료일투괄용우다충수구적격광빈솔화광강공제계통。해계통기우성광조제기，병집성료격광이빈、광강은정화광강조제등공능。수선，근거원자간섭의적원리，제출대격광적요구화지표。접착，안조제출적요구설계료집성쇄상빈솔합성기등경건전로계통화LabVIEW연건공제계통。최후，대소개발적계통진행료실험측시。실험결과표명：계통적이빈범위가공제재100～200 MHz；광강은정성호，채용은광계통후수출광강적파동감소위2％。설계적저투계통공능제전，가고유효，실현예기목표，만족원자간섭의대광학계통적요구。령외차계통환가이응용도기타수요계통중，비여원자종、원자간섭중력제도의등。
In order to control laser beams precisely in a caesium atom interferometer,a laser frequency and power con-trol system which is suitable for various demands is designed. Based on an acousto-optical modulator,the system in-tegrates the functions of frequency shift,power stabilization and modulation. Firstly,based on the principle of the at-om interferometer,the requirement of the optical part in the system is proposed. Secondly,the hardware circuit sys-tem including a phase-locked loop frequency synthesizer and the LabVIEW software control system are designed. Fi-nally,the developed system is tested. The experimental results show that the frequency shift range of the laser beam through the acousto-optical modulator is 100~200MHz;and the power fluctuation of the laser decrease to 2% using the power stabilization system. The designed system has multi-functions,achieves the desired aims and satisfies the requirements of atom transition,matter wave interference and other processes to laser beams. In addition,the de-signed system could be applied to other systems which need to adjust and control laser beam precisely,such as atomic clock,atom interferometer gravity gradiometer and so on.