CAJ | 학술논문

CPT磁力仪是一种用于微弱磁场测量的新型高灵敏度原子光学磁力仪,针对CPT磁力仪垂直腔面发射激光器电流调制需要产生低相位噪声调制信号,提出了一种基于锁相环频率合成器的方案.该方案从CPT磁力仪的基本原理出发,分析了CPT磁力仪对调制信号的频率要求,根据锁相环频率合成基本原理,采用锁相环仿真软件ADIsimPLL完成了频率合成器中关键模块参数的确定,产生了高精度、低相噪以及杂散性好的3.4 GHz频率信号,并对系统性能进行了仿真分析.经仿真测试表明,锁相效果良好,性能可靠,可以满足CPT磁力仪的研制.
CPT자력의시일충용우미약자장측량적신형고령민도원자광학자력의,침대CPT자력의수직강면발사격광기전류조제수요산생저상위조성조제신호,제출료일충기우쇄상배빈솔합성기적방안.해방안종CPT자력의적기본원리출발,분석료CPT자력의대조제신호적빈솔요구,근거쇄상배빈솔합성기본원리,채용쇄상배방진연건ADIsimPLL완성료빈솔합성기중관건모괴삼수적학정,산생료고정도、저상조이급잡산성호적3.4 GHz빈솔신호,병대계통성능진행료방진분석.경방진측시표명,쇄상효과량호,성능가고,가이만족CPT자력의적연제.
Coherent population trapping (CPT) magnetometer is a new high sensitive atomic optical magne?tometer for weak magnetic field measurement. According to low phase noise modulated signal requirements in the process of current modulation of vertical cavity surface emitting lasers (VCSEL) of the magnetometer, a scheme based on phase locked loop (PLL) frequency synthesizer is presented. On the basis of basic principles of CPT magnetometer, frequency requirements of modulated signal for CPT magnetometers are analyzed. According to basic principles of frequency synthesis of PLL, key module parameters in frequency synthesizers are determined by ADIsimPLL software. A 3.4 GHz frequency signal with high precision, low phase noise and good spurs is generated and simulation analysis is performed to the system. Simulation results shows that the system has good phase-locking effect, reliable per?formance and can meet the research of CPT magnetometer.