外文题目: Compensation for the spatial periodic modulation of the near-field beam with an improved iterative weight-based method
作者: Gao, Yaru; Liu, Dean; Yang, Aihua; Tang, Ruyu; Zhu, Jianqiang
刊名: Optik
年: 2017 卷: 143 页： 59--65
英文关键词:
Improved weight-based method; Spatial periodic modulation; Near-field beam quality
NATIONAL-IGNITION-FACILITY; LIGHT-MODULATOR; LASER-BEAM; PHASE; PERFORMANCE; ALGORITHM; PINHOLES; CLOSURE; FILTER; IMAGE
英文摘要:
An improved iterative weight-based method is studied to compensate for the spatial periodic modulation (SPM) of the near-field beam, Based on the beam angular spectrum transmit formula (ASTF). the required phase that compensates for the intensity distribution of the incident SPM beam is iterated by this algorithm, which can contribute to improve the uniformity and quality of the output near-field beam. The experimental results show that the similarity values is improved from 0.9878 to 0.9947 and is getting closer to 1. The modulation degree M of the output near-field beam is decreased from 1.3631 to 1.3401 and the contrast degree C is decreased from 0.3018 to 0.2635 by using the liquid-crystal spatial light modulator (SLM). This indicates that the experiment verifies the feasibility of this iterative method to compensate for the SPM of the near-field beam.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1016/j.ijleo.2017.06.057


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