CAJ | 학술논문

为了提高光信息处理元件的性能,实现高效率光信号的静止与存储,本文建立了由双向耦合场耦合的冷铷（87Rb）原子的四能级双Λ型能级机制,并对此机制在生成静态光信号时要求的高效性、持续时间,控制耦合场所需的操作条件以及对信号场强度的相位调制等进行了研究。首先,选取四能级双Λ型87Rb冷原子精细能级,用一对反向传播的行波激光场对能级进行近共振耦合,并沿耦合场方向输入一个正向弱光信号进行探测。接着,通过适当的绝热开启、关闭耦合场,存储光信号和生成高保真度静态光信号。然后,通过选取87Rb原子的不同精细能级结构,得出实现静态光所需满足的必要条件。最后,采用相位调制法对光信号进行处理。结果表明：生成的静态光信号具有高效性,过程持续时间约为80μs;相位调制法可以周期调节静态光脉冲的强度。在此机制下生成的静态光信号满足高效性、易于全光调节和长时效性等要求。
위료제고광신식처리원건적성능,실현고효솔광신호적정지여존저,본문건립료유쌍향우합장우합적랭여（87Rb）원자적사능급쌍Λ형능급궤제,병대차궤제재생성정태광신호시요구적고효성、지속시간,공제우합장소수적조작조건이급대신호장강도적상위조제등진행료연구。수선,선취사능급쌍Λ형87Rb랭원자정세능급,용일대반향전파적행파격광장대능급진행근공진우합,병연우합장방향수입일개정향약광신호진행탐측。접착,통과괄당적절열개계、관폐우합장,존저광신호화생성고보진도정태광신호。연후,통과선취87Rb원자적불동정세능급결구,득출실현정태광소수만족적필요조건。최후,채용상위조제법대광신호진행처리。결과표명：생성적정태광신호구유고효성,과정지속시간약위80μs;상위조제법가이주기조절정태광맥충적강도。재차궤제하생성적정태광신호만족고효성、역우전광조절화장시효성등요구。
In order to improve the performance of optical information processing components and to achieve high efficiency optical signals for static storage,a four-level double-Lambda cold 87Rb atomic system driven by two counter-propagating travelling wave fields is established,and the necessary Stationary Pulse Light（SLP） conditions of controlling coupling fields and phase modulation ways to control probe intensity are studied.First,the four-level double-Lambda cold 87Rb atomic energy level driven by two counter-propagating travelling wave fields is selected,and the forward resonance coupling field is switched on to guide only one forward incident signal into samples for detection.Then,the optical signals are stored and efficient SLPs are generated through switching on and turning off two coupling fields.The necessary conditions to generate efficient SLPs are obtained according to selecting different fine structures of energy level.Finally,the phase modulation method of control stationary light intensity is attained.The results indicate that the system can generate efficient SLPs with continue time nearly 80 μs and the phase modulation can adjust the stationary light intensity periodically.Obtained SLPs satisfy the optical signal processing requirements for higher efficiency,higher fidelity,all-optical control and long timeliness.