【作者】 董雅宾；

【导师】 张俊香； 郜江瑞；

【作者基本信息】 山西大学 ， 光学， 2006， 博士

【摘要】 在过去几十年中，基于原子相干现象，人们发现了许多量子效应，例如相干布居俘获(CPT)、电磁诱导透明(EIT)、无粒子数反转放大激光(LWI)等，并将其应用于相干介质中的光脉冲减慢，光存储以及非线性折射率增强等过程中。此外，这些效应还可应用于高灵敏磁力计的设计，量子计算，量子逻辑门，量子开关及量子干涉光学平版印刷术等。 本文回顾了电磁诱导相干介质中相关量子效应的发展与应用。并着重研究了简并二能级原子系综中的量子相干效应；利用电磁诱导透明过程制备单光子态；光脉冲群速度在电磁诱导相干介质中的减慢；以及利用电磁诱导相干介质减少量子噪声。完成的工作主要包括以下几个方面： 1．为了从实验上研究电磁诱导相干介质中相关的量子效应，需要窄线宽，可调谐的稳频激光器系统。我们采用饱和吸收稳频技术将激光器的频率稳定在Cs原子D2线超精细能级跃迁线上。并且激光器的连续调谐范围约22GHz。同时我们还测量了半导体激光器的线宽。 2．从理论和实验上研究了简并二能级系统中的量子相干效应。讨论了当改变耦合光的光强或改变磁场强度时的电磁诱导透明窗口的平移和展宽现象，实验数据与理论结果定性吻合。 3．理论上研究了三能级∧型电磁诱导透明系统中辐射场的二阶相干度。计算结果表明，EIT系统中的原子相干效应使得上能级共振荧光辐射更多还原

【Abstract】 In the past decades, based on the atomic coherence, many quantum effects have been found, such as coherent population trapping (CPT), electromagnetically induced transparency (EIT), lasing without inversion (LWI), which were applied in slow pulse light, storage of quantum information in a coherent media and enhancement of the refractive index etc. In addition, these effects can also be applied in the design of highly sensitive magnetometers, quantum computation, the quantum logic gate, quantum switches and quantum interferometric optical lithography and so on.In this thesis, the development and applications of related quantum effects in electromagnetically induced coherent media are reviewed systematically. And the quantum coherence effects in a degenerate two-level atomic ensemble, single-photon state generation via electromagnetically induced transparency process, the reduction of the group velocity of light pulse and the reduction of quantum noise in electromagnetically induced coherent media are investigated emphatically. The accomplished main works are as follows: 1. In order to study the related quantum effects in electromagneticallyinduced coherent media experimentally, a broad band, tunable and narrowlinewidth frequency locking laser system is needed. By using the更多还原