Reflective ghost imaging free from vibrating detectors

Li, Hengxing; Bai, Yanfeng; Shi, Xiaohui; Nan, Suqin; Qu, Lijie; Shen, Qian; Fu, Xiquan

doi:10.1088/1674-1056/26/10/104204

Cited by 8 publications

(7 citation statements)

References 34 publications

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“…Ghost imaging (GI) is a special optical imaging scheme, [1][2][3][4][5][6][7] where one of the two spatially correlated optical beams illuminates an object and is detected by a bucket detector without any spatial resolution, and the other beam is measured by a spatially resolving detector or computing offline. Then the object could be imaged by correlating the speckle patterns and corresponding bucket detector signals.…”

Section: Introductionmentioning

confidence: 99%

Compressed ghost imaging based on differential speckle patterns*

Wang

Zhao

2020

Chinese Phys. B

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We propose a compressed ghost imaging scheme based on differential speckle patterns, named CGI-DSP. In the scheme, a series of bucket detector signals are acquired when a series of random speckle patterns are employed to illuminate an unknown object. Then the differential speckle patterns (differential bucket detector signals) are obtained by taking the difference between present random speckle patterns (present bucket detector signals) and previous random speckle patterns (previous bucket detector signals). Finally, the image of object can be obtained directly by performing the compressed sensing algorithm on the differential speckle patterns and differential bucket detector signals. The experimental and simulated results reveal that CGI-DSP can improve the imaging quality and reduce the number of measurements comparing with the traditional compressed ghost imaging schemes because our scheme can remove the environmental illuminations efficiently.

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Section: Introductionmentioning

confidence: 99%

Compressed ghost imaging based on differential speckle patterns*

Wang

Zhao

2020

Chinese Phys. B

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“…[7] Then, the realization of GI with classical light source (pseudo thermal light) was proposed in 2002 by Bennink et al [8] Thereafter, the mechanism and implementation of GI were discussed. [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] Later, a new configuration of GI, named computational GI (CGI), was presented to simplify the experimental requirements of GI. [10] At the same time, the improved methods, for example, differential ghost imaging, [11] normalized ghost imaging, [12] corresponding ghost imaging, [13,14] compressive sensing ghost imaging, [15][16][17][18] and polarization difference ghost imaging method, [19] were proposed to enhance the imaging quality or to reduce the imaging time.…”

Section: Introductionmentioning

confidence: 99%

Experimental demonstration of influence of underwater turbulence on ghost imaging*

2019

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It is difficult to obtain a clear image in underwater turbulence environment with classical imaging methods due to the absorption, scattering, and underwater turbulence on the propagation beam. However, ghost imaging (GI), a non-locally imaging technique, has shown the turbulence-free ability in atmospheric turbulence by exploiting the second-order correlation between the signal beam and the reference beam. In this paper, we experimentally investigate the imaging quality of GI affected by the underwater environment, where the underwater environment is simulated by a 1 m × 0.4 m × 0.4 m tank with distilled water. The water temperature is controlled by a heater inside the tank, and a temperature gradient is obtained by putting the heater at different positions of the tank. The water vibration is produced by a heavy force, and the turbid medium is obtained by dissolving very small specks of CaCO3 in the water. A set of Hadamard speckle pattern pairs are generated and modulated on the incident beam, and then the beam illuminates on an unknown object after passing through the simulated underwater environment. With the second-order correlations, the image is reconstructed under different temperature gradients, water vibration, and turbid medium ratios. The results show that GI has the turbulence-free ability under lower temperature gradient, water vibration, and turbid media. The structural similarity image measurement (SSIM) values of the reconstructed images only start to decrease when the temperature gradient is greater than 4.0 °C. The same temperature gradient produced at the different positions has a little effect on the quality of the underwater GI.

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“…How to enhance the anti-jamming ability of radar is an urgent problem to be solved in the traditional radar countermeasures technology. [1,2] In the last two decades, with the intensive research and development of the techniques of quantum communication, [3][4][5] quantum imaging, [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] and quantum radar, [23,24] a series of results have been obtained, which provide a solution for improving the anti-jamming ability of radar.…”

Section: Introductionmentioning

confidence: 99%

“…[6] In a long time, entanglement swapping was considered as the necessary condition for GI. [25] However, from 2002 GI was implemented by classical light sources, [9][10][11][12][13][14][15][16][17][18] especially the groups of Wang, [12] Wu, [13] and Han [14,15] accomplished a large numbers of GI experiments based on pseudo-thermal or real thermal light sources, which proved that entanglement is not the one and only way to achieve GI. After then, computational ghost imaging (CGI) was proposed [19] and verified by experiments, [20,21] which could be deployed with only one optical beam and one detector with no spatial resolution by replacing the reference beam with a controllable and pre-modulated light source.…”

Section: Introductionmentioning

confidence: 99%

Proof-of-principle experimental demonstration of quantum secure imaging based on quantum key distribution

et al. 2019

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We present a quantum secure imaging (QSI) scheme based on the phase encoding and weak+vacuum decoy-state BB84 protocol of quantum key distribution (QKD). It allows us to implement a computational ghost imaging (CGI) system with more simplified equipment and reconstructed algorithm by using a digital micro-mirror device (DMD) to preset the specific spatial distribution of the light intensity. What is more, the quantum bit error rate (QBER) and the secure key rate analytical functions of QKD are used to see through the intercept-resend jamming attacks and ensure the authenticity of the imaging information. In the experiment, we obtained the image of the object quickly and efficiently by measuring the signal photon counts with a single-photon detector (SPD), and achieved a secure key rate of 571.0 bps and a secure QBER of 3.99%, which is well below the lower bound of QBER of 14.51%. Besides, our imaging system uses a laser with invisible wavelength of 1550 nm, whose intensity is as low as single-photon, that can realize weak-light imaging and is immune to the stray light or air turbulence, thus it will become a better choice for quantum security radar against intercept-resend jamming attacks.

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Reflective ghost imaging free from vibrating detectors

Cited by 8 publications

References 34 publications

Compressed ghost imaging based on differential speckle patterns*

Compressed ghost imaging based on differential speckle patterns*

Experimental demonstration of influence of underwater turbulence on ghost imaging*

Proof-of-principle experimental demonstration of quantum secure imaging based on quantum key distribution

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