Relaying and spatial filtering on beam propagation are required in order to overcome self-focusing damage.
为了克服自聚焦造成的破坏要求在光束传播中采用中继成像和空间滤波。
Photorefractive (PR) spatial solitons form when the self-focusing of a light beam inside the PR material exactly balances the diffraction of the beam.
光折变空间光孤子是指当光折变材料的自聚焦效应与光束的衍射发散作用相平衡时，在介质内无衍射向前传播的光束。
Time reversal is a unique self-focusing technique for spatial and temporal focusing of sound in unknown environments.
【中英文摘要】时反法是一种新颖的自适应聚焦技术，它可以使声信号在未知环境下实现时空聚焦。
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