介绍了几种光回波损耗的测量原理和测量方法。
Several kinds of measurement principles and methods for optical return loss (ORL) are introduced.
辐射出的光被称为光子回波，它的观测表明我们对于原子的量子态进行了完全的控制。
The burst of light is called a photon echo; and its observation proved we have full control over the quantum state of the atoms.
介绍了后向散射回波与信标光到达角起伏的原理性比对实验。
The contrastive experiment of back-scattering echo and beacon angle-of-arrival fluctuation was introduced.
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