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High-resolution multi-planar coherent diffraction imaging with multimode fiber source

delete2021-05-01
delete11
PRE
AI
Y
Yuanyuan Liu
刘
刘庆文 (Qingwen Liu) *
Y
You Li
J
Junyong Zhang *
何
何祖源 (Zuyuan He)
DOI:10.1016/j.optlaseng.2021.106530delete
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摘要

摘要

En 中文
Coherent diffractive imaging (CDI) is a lensless, high-resolution imaging method. In order to overcome the problems of poor-quality image and slow convergence of iterative algorithm in traditional CDI, an innovative setup for the multimode-based phase retrieval method is proposed. Here the multimode fiber source was selected as the light source to replace the traditional plane-wave incidence. Due to the nature of the multimode fiber, a speckle light field can be generated on the output fiber facet and then is used to illuminate the object. Thus the diffraction field can be rapidly changed at a very short distance so as to realize much higher resolution and consume less iteration time. Then a phase-only spatial light modulator (SLM) is used as a negative lens instead of a positive lens in a 4f imaging system for the advantage of larger detection space. This proposed setup has many advantages such as a simpler structure and static recording. The comparison experiments with plane waves confirm that our proposed method has higher reconstruction resolution and smaller iteration errors.
Keyword:
Coherent diffraction imaging
Multimode fiber
Spatial light modulator
Staic recording
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期刊

Optics and Lasers in Engineering 封面图
Optics and Lasers in Engineering
IF:
3.7
论文数:
7.3K
被引数:
1.7W

机构

S
shanghai jiao tong university
学者数:
15.7W
论文数: 11.7W
被引数: 159
C
chinese academy of sciences
学者数:
56.7W
论文数: 45.0W
被引数: 704
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