外文题目: On-shot laser beam diagnostics for high-power laser facility with phase modulation imaging
作者: Pan, X.; Veetil, S. P.; Liu, C.; Tao, H.; Jiang, Y.; Lin, Q.; Li, X.; Zhu, J.
刊名: Laser Phys. Lett.
年: 2016 卷: 13 期: 5 文章编号：55001
英文关键词:
phase retrieval; laser beam characterization; diffractive optics; image reconstruction techniques
FOCAL-SPOT CHARACTERIZATION; SHACK-HARTMANN SENSOR; PTYCHOGRAPHY; MICROSCOPY; RESOLUTION; RETRIEVAL; SYSTEMS
英文摘要:
A coherent-modulation-imaging-based (CMI) algorithm has been employed for on-shot laser beam diagnostics in high-power laser facilities, where high-intensity short-pulsed lasers from terawatt to petawatt are designed to realize inertial confinement fusion (ICF). A single-shot intensity measurement is sufficient for wave-front reconstruction, both for the near-field and far-field at the same time. The iterative reconstruction process is computationally very efficient and was completed in dozens of seconds by the additional use of a GPU device to speed it up. The compact measurement unit-including a CCD and a piece of pre-characterized phase plate-makes it convenient for focal-spot intensity prediction in the target chamber. It can be placed almost anywhere in high-power laser facilities to achieve near-field wave-front diagnostics. The feasibility of the method has been demonstrated by conducting a series of experiments with diagnostic beams and seed pulses with deactivated amplifiers in our high-power laser system.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1088/1612-2011/13/5/055001


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