Defining speckle-based spectral metric from a linear array detector for characterizing the laser focusing spot

doi:10.1016/j.optcom.2021.127397

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	Defining speckle-based spectral metric from a linear array detector for characterizing the laser focusing spot
	D. B. Che; T. F. Wang; S. Zhang; Y. Y. Li; Y. Han and Z. Yu
	2022
Source Publication	Optics Communications
ISSN	0030-4018
Volume	502 Issue:7
Abstract	Speckle modulation in the laser beam projection scenarios such as adaptive optics, remote sensing, and active imaging has been a long-standing challenge that causes intensity fluctuation and further degrades the performance of the system. Speckle statistical characteristics coupled with the feature of the laser beam intensity distribution can be obtained by analyzing the speckle variation through a single point detector or an image sensor. A single point detector has the advantage in high sampling rate but may lose speckle spatial information, while the image sensor has a high spatial resolution but slow sampling rate. In this paper, we defined a dynamic speckle metric based on a linear array detector to estimate the encircled energy of the far field spot on the diffuse target, which well balanced the trade-off between sampling rate and spatial resolution. The potential of the metric is analyzed using a physics-based speckle simulation and experimental verification. Both results agree with each other, showing that the metrics based on the speckle-field spatiotemporal spectrum analysis are monotonically dependent on the target focused-spot size.
DOI	10.1016/j.optcom.2021.127397
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Indexed By	SCI
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Document Type	期刊论文
Identifier	http://ir.ciomp.ac.cn/handle/181722/65131
Collection	中国科学院长春光学精密机械与物理研究所
Recommended Citation GB/T 7714	D. B. Che,T. F. Wang,S. Zhang,et al. Defining speckle-based spectral metric from a linear array detector for characterizing the laser focusing spot[J]. Optics Communications,2022,502(7).
APA	D. B. Che,T. F. Wang,S. Zhang,Y. Y. Li,&Y. Han and Z. Yu.(2022).Defining speckle-based spectral metric from a linear array detector for characterizing the laser focusing spot.Optics Communications,502(7).
MLA	D. B. Che,et al."Defining speckle-based spectral metric from a linear array detector for characterizing the laser focusing spot".Optics Communications 502.7(2022).

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中国科学院长春光学精密机械与物理研究所