Computational ghost imaging with higher-order cosh-Gaussian modulated incoherent sources in atmospheric turbulence
| Autor: | Chun-Ling Luo, Ai-Xi Chen, Zhimin Liu, Jing Cheng |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Physics
business.industry Turbulence Gaussian Resolution (electron density) Order (ring theory) Function (mathematics) Ghost imaging Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials symbols.namesake Quality (physics) Optics symbols Electrical and Electronic Engineering Physical and Theoretical Chemistry business Beam (structure) |
| Zdroj: | Optics Communications. 352:155-160 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2015.05.008 |
| Popis: | We show that the resolution of the computational ghost imaging (CGI) system through atmospheric turbulence can be significantly improved by modulating a coherent source with high-order cosh-Gaussian functions. The analytical formula for the CGI system with a higher-order cosh-Gaussian source in turbulent atmosphere is derived and can be viewed as the original object convoluted a point-spread function (PSF). The imaging quality is mainly determined by the size of the PSF, which is closely related to the source parameters of the higher-order cosh-Gaussian beam, the turbulent strength and the propagation distance. Numerical examples are given to clearly see the effects of the above system parameters on the PSF and the quality of the CGI system. Compared with the widely used Gaussian source, it is found that the resolution of CGI can be obviously enhanced by properly adjusting the parameters of the higher-order cosh-Gaussian sources. Thus this kind of shaped source can be used to improve the imaging resolution and may be helpful to the CGI real applications. |
| Databáze: | OpenAIRE |
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