利用激光边带注入法实现光脉冲的减速和存储

基于激光边带注入法在铷原子蒸气中实现了电磁诱导透明、光脉冲的减速和存储.为实现对铷原子的相干操控,将主激光器的输出锁定在铷87原子D1线F=1→F'=2的跃迁谱线上,经6.8 GHz电光调制器(EOM)调制后,负一阶频率边带与D1线F=2→F'=2跃迁频率共振.将负一阶频率边带注入锁定从激光器,主激光器和从激光器输出的两束激光和铷原子的两基态超精细能级达到双光子共振,实现相干操控铷原子.将主激光器和从激光器输出的两束激光作为探测光和耦合光输入到铷泡中,通过操控两光束的波形和开关观察到电磁诱导透明、光脉冲的减速和存储.

Realization of optical pulse deceleration and storage by using laser sideband injection

Electromagnetic induced transparency,optical pulse deceleration and storage in rubidium atomic vapor are realized based on laser sideband injection method.In order to realize the coherent manipulation of rubidium atoms,the output of master laser is locked on the F =1 → F'=2 transition of D1 line of 87Rb atoms.After modulated by an electro-optic modulator (EOM) with frequency of 6.8 GHz,the negative first frequency sideband generates resonance with the transition frequency of F =2 → F'=2 transition of D1 line.The negative first frequency sideband is injected into the locked slave laser,and the two output beams of the master and slave lasers are two-photon resonant with the two hyperfine energy levels of the ground state of rubidium atom,which can be used to coherently manipulate rubidium atoms.The two output beams of the master and slave lasers can be input into a rubidium vapor cell,as the probe and coupling lights,respectively.Electromagnetic induced transparency,deceleration and storage of optical pulse can be obtained by manipulating the waveform and switch of the two beam.