Experimental Research Of The Transmission Spectrum Based On The Three Level Atom Coupled With Standing-Wave Cavity

In recent years,with the further development of scientific theory and experimental technology,based on the research of atomic nonlinear cavity QED system has entered a new period,many of the team at home and abroad have done a lot of fruitful work,its research content and the scope also more and more widely,some experimental methods and theories also extended to the study of solid materials,semiconductor quantum dots.Its roughly divided into three aspects:first of all,the inner cavity of the EIT expand further research,such as inner cavity nuclear EIT effect of cavity QED system based on a large number of atoms of interaction between full light control,etc.;Next,it is based on the application of high precision optical microcavity research,such as through single atoms and micro cavity of strong coupling,realizes the accurate measurement of the single atomic orbitals,etc;Another more hot area of research is based on cavity QED system research of four-wave mixing effect.In hot atoms and cavity in the experimental study of coupling system are mostly based on?type three level atom with circular cavity in the system,because in the ring cavity,game modes(detecting light)and a single through the coupling field of atomic medium is spread direction,avoids the doppler effect.This thesis mainly research is based on the standing-wave cavity to complete in the system.Because of game modes on resonance cavity reciprocating transmission form,and the coupling field direction transmission and polarization characteristics of back propagation is different,so the cavity transmission spectrum will show with different physical properties in the ring cavity.Theory,we consider the doppler effect of the atom,analysis of the probe and coupling light direction spread and propagation,atomic medium showed polarization characteristics,including dispersion characteristics and absorption characteristics,and transparent effect and the pump effect of standing-wave cavity inner cavity EIT effect;Experiment,research in cesium atoms and confocal standing-wave cavity coupling system,when the light coupling respectively in the center of the atomic resonance frequency and single photon detuning,the modes of the transmission spectrum of the probe field.In order to obtain high signal-to-noise ratio and high efficiency cavity transmission spectrum of the signal,in addition to improving precision cavity at the same time,also must choose the appropriate cesium atomic gas chamber,in order to make sure anticross between field and atom cavity resonance produced by the nonlinear effects,such as vacuum rabbi division and electromagnetic induction lumen transparent effect can be observed clearly.In the experiment,through the atomic sample appropriate compensation field method to reduce the collisions between the ground state of atomic coherent elimination of samples,end surface plating coating to improve the atomic linear loss of air chamber,etc.When eliminate effectively restrain coherent atomic coherent effects caused by dispersion increase sharply,leading to effective nonlinear,enhanced the internal quantization of medium light field can be realized in the decrease of the quantum noise,optimization of the quantum of the signal field,improve the signal to input probe field and atomic coherence function after effective keep information,to realize the best transformation and transfer of quantum information.This paper mainly studies nearly confocal standing-wave cavity inner cavity in the EIT condition of experiment,and coupling optical frequency detuning modes mismatch,particle number density and other parameters on the result of the experiment.End up with no coupling rabbi split peak light at different temperatures,and combined with the coupling modes after light coupling optical detuning on the cavity detuning is zero and the influence of coupling transmission peak light at constant mismatch under different modes detuned cavity transmission peak.