Deceleration And Storage Of An Optical Pulse Based On The Injection Seeding Using The Laser Sideband

Deceleration and storage of light pulse is a hot issue in recent years, research in the field of quantum optics. To achieve deceleration and storage of light pulse by using electromagnetically induced transparency principle, through fiber optic electro-optic modulator phase modulating and the injection locking technique to obtain a frequency difference of 87Rb atom D1 line two hyperfine ground state level of frequency difference 6.83GHz Raman. The two light beams are used as the probe light and coupling light in the experimental study, which acting on the temperature 65℃ of rubidium bubble. When frequency scanned, the EIT spectrum is achieved. The deceleration and storage of light pulse is realized at the light pulse two-photon resonance.In experiment considering the depth of the transition intensity and electromagnetically induced transparency of the window, we select the probe light corresponding to the energy level of the transition F=1 â†' F’=2, the coupling of light corresponding to the transition energy level F=2â†'-F’= 2.In order to obtain two beams frequency difference of 6.83GHz and achieve deceleration and storage of light pulse between 87Rb atoms D1 line hyperfine energy level transitions, carried out the following research work. The main research work is summarized as follows:First, through the saturated absorption spectrum frequency stabilization, the master laser frequency locked to the atoms 87Rb D1 line F=1â†' F’=2 transition coupling, this frequency of light as the probe light.Second, to obtain multi-stage fiber laser sideband by electro-optic modulator 6.83GHz phase modulation, these sidebands are injected into the slave laser by adjusting the injection current value of the laser power from the laser, experiments show any of the order sideband locked.Third, the lock was chosen first-order sidebands to give the transition level F=2 â†'> F’=2 is coupled to the light, the light is coupled with the probe light, the role of thermal rubidium atoms, scanning probe light frequency obtained EIT spectrum. At two-photon resonance, modulation of the probe light power linear Gaussian wave packet receive pulse, get results slower burst speed of light. Finally, experiments by controlling the coupling of light to close and open, experimental results obtained with the extracted light pulse storage.