1. counter-propagating的意思

1. The key components in laser gyro is He-Ne ring laser, and the reciprocal action theory between light and medium is the base in studying the ring laser, use the Lamb half classical theory, and on the base of density matrix theory, the optical Brounch equation was established, which described the movement of amplifying medium atom in the ring syntonic cavity, and according to the medium polarize theory the self consistent equations was deduced, which describe the light intensity and phasic of the counter-propagating wave. On the basis of this equations, adopted the simulation software MATLAB and virtual instrument programming language LabWindows/CVI, we can do some simulated experiments in study the phenomenas such as amplify and dispersive characteristic of medium, mode pushing effection, burned hole effection and pattern competition, lock-in of frequency and the characteristic of light intensity and phasic of the counter-propagating wave in laser gyro.

激光陀螺的核心部件为He-Ne环形激光器，而掌握光与介质的相互作用理论是研究激光器的关键，采用拉姆半经典理论为主，在密度矩阵理论的基础上，推导环形谐振腔中描述He-Ne气体增益介质原子运动的光学布洛赫方程，运用介质极化理论得出描述激光陀螺反向行波的光强、位相所满足的自洽场方程组，在此基础上，运用MATLAB仿真软件和虚拟仪器编程语言LabWindows/CVI，对激光陀螺中的介质增益色散特性、频率牵引效应、烧孔效应及模竞争、闭锁效应及环激光的光强和相位特性进行仿真试验研究，并且运用全量子理论，对激光工作原理进行分析，得出二能级系统单模辐射场的光子数密度分布，得出激光场的光子统计分布，仿真激光场的动态建立过程。

2. In the resonator optic gyroscope, the angular rotation velocity is measured through the detection of the resonant frequency difference between the clockwise and the counter-clockwise lightwaves counter-propagating in the resonator.

在谐振式光学陀螺中，通过检测谐振腔顺时针和逆时针光路的谐振频率差得到角速率。

3. We discuss the feasibility of realizing a cold atom space clock with counter-propagating cold atoms in microgravity.

在本文中我们讨论了在空间微重力环境下利用对射冷原子团实现空间冷原子钟的可能性。

4. A stable standing-wave field, which is formed by a pair of counter-propagating pump fields, periodically modulates the space distribution of the population of the thermal two-level rubidium atoms and constructs a PDG.

一对反向传播的泵浦光形成稳定的驻波场，并对二能级原子布居数差的空间分布进行周期调制，从而形成一个布居数差光栅。