基于延时相干控制的光增益调制  

Modulation of the Optical Gain Based on the Temporal Coherent Control

作　　者：时坚[1] 马瑞琼[1] 常凌颖[1] 段作梁[1] 

机构地区：[1]西安邮电大学电子工程学院,西安710121

出　　处：《科学技术与工程》2013年第26期7605-7608,共4页Science Technology and Engineering

基　　金：陕西省自然科学基金(2012JQ8014);陕西省教育厅自然科学基金(12JK0978);西安邮电大学校青年基金(1010471)资助

摘　　要：针对传统的弱场光增益相干控制方案中控制参数单一且难以实现精确控制的现状,提出了一种在简并二能级原子体系中利用延时实现弱光增益控制的新方案。方案以一强一弱两个偏振方向相互垂直的序列脉冲作用于简并二能级原子体系中,先由强场预置相干态,然后用有延时的弱场探测该相干体系。通过理论研究弱场的传播特性与延时间的关系,发现利用延时控制可以实现对弱场共振作用的开关控制,并精确调制弱场的增益。A project of the temporal coherent control for the modulation of the optical gain was presented. A degenerate two-level system was considered which driven by a sequence of two coherent pulses -the strong one preparing the coherent state and a weak one probing the state. It was demonstrated theoretically that an efficient control of the optical gain for the weak pulse can be achieved by tuning the time delay between the pulses. An interesting consequence of this mechanism is to switch off/on the resonant interaction for the weak pulse and to control the optical gain accurately.

关 键 词：光频移 相干控制 光增益 量子干涉 

分 类 号：O431.2[机械工程—光学工程]