CAJ | 학술논문

提出了一种新的基于预热温度轨迹规划和轨迹跟踪的塞曼稳频激光器预热控制方法.根据纵向塞曼激光器稳频控制过程的特点,规划了预热过程中谐振腔的一阶指数温度轨迹,以在不同温度环境下兼顾预热效率和稳频效果.采用预测函数控制(PFC)算法,通过预测输出的滚动优化和反馈校正,使激光器谐振腔温度精确跟踪规划轨迹上升直至逼近预设温度阈值θset.最后,建立纵向塞曼激光器预热及稳频控制系统,在不同环境温度下对本文预热方法进行实验验证.实验结果表明,在15～25 ℃内,基于本文控制方法的稳频系统可在16 min内完成预热和激光频率锁定,且不同环境温度下的锁定温度变化范围＜0.4 ℃,相应的中心频率环境温度漂移＜0.25 MHz(相对漂移0.5×10-9).该方法为提高稳频系统的预热效率和稳频效果提供了一种新的技术途径.
제출료일충신적기우예열온도궤적규화화궤적근종적새만은빈격광기예열공제방법.근거종향새만격광기은빈공제과정적특점,규화료예열과정중해진강적일계지수온도궤적,이재불동온도배경하겸고예열효솔화은빈효과.채용예측함수공제(PFC)산법,통과예측수출적곤동우화화반궤교정,사격광기해진강온도정학근종규화궤적상승직지핍근예설온도역치θset.최후,건립종향새만격광기예열급은빈공제계통,재불동배경온도하대본문예열방법진행실험험증.실험결과표명,재15～25 ℃내,기우본문공제방법적은빈계통가재16 min내완성예열화격광빈솔쇄정,차불동배경온도하적쇄정온도변화범위＜0.4 ℃,상응적중심빈솔배경온도표이＜0.25 MHz(상대표이0.5×10-9).해방법위제고은빈계통적예열효솔화은빈효과제공료일충신적기술도경.
In order to stabilize the Zeeman laser accurately within a short period at different ambient temperatures,a preheating method was proposed based on temperature trajectory planning and tracing.The structure of Zeeman-stabilized laser and the basic principle of frequency stabilization were discussed.Then, the tube temperature trajectory was planned as a modified exponential function of preheating time to expedite frequency locking and to improve laser frequency stability,and the Predictive Functional Control(PFC) arithmetic was employed to force the tube temperature to rise along the planned trajectory precisely.Finally,the several experiments were carried out to prove the effectiveness of the proposed preheating method.The experimental results indicate that the Zeeman laser using the proposed method can be preheated effectively at ambient temperature of 15～25 ℃,and the laser frequency can be locked in 16 min with a temperature-dependent frequency drift below 0.25 MHz.The proposed method can satisfy the requirements for improving preheating speed and frequency stability for Zeeman-stabilized lasers.