Robust Far-Field Optical Image Transmission with Structured Random Light Beams

Liu, Yonglei; Zhang, Xuan; Dong, Zhen; Peng, Deming; Chen, Yuntian; Wang, Fei; Cai, Yangjian

doi:10.1103/physrevapplied.17.024043

Cited by 33 publications

(9 citation statements)

References 64 publications

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“…In the space-frequency domain, the second-order statistical properties of partially coherent sources, propagating along the z-axis, can be described in terms of their crossspectral density function. In the source plane (z = 0), the cross-spectral density function of a partially coherent beam carrying a cross-phase has the following form 30 :…”

Section: Theoretical Model For a Pclg Beam And Computational Propagat...mentioning

confidence: 99%

“…It is well known that turbulent atmosphere can provide a kind of phase disturbance to the transmitted light. To study the propagation of light waves in turbulent atmosphere, we choose the most widely used multiphase screen method 30,36 , i.e., first decompose an incoming beam into a series of random electric fields, and then let these random electric fields pass through the turbulent atmosphere. During propagation, the turbulence is equivalent to a collection of thin random phase screens with the desired turbulence statistics.…”

Section: Theoretical Model For a Pclg Beam And Computational Propagat...mentioning

confidence: 99%

“…The cross phase is a quadratic phase structure distinct from the ordinary twist phase 41 , which finds versatile applications in coherent modes conversion 37 , beam rotation 38 , and optical vortices manipulation 39 , and flexible beam focus 40 . More recently, cross phase has been used to enhance the anti-disturbance ability of light beams during transmission, but so far has been limited to non-vortex circumstances 30,31 . In this work, we find that by introducing the cross-phase into the degree of coherence structure of a partially coherent vortex beam, the far-field spatial-coherence structure can remain invariant even with an obstacle and a turbulent in propagation channels.…”

Section: Introductionmentioning

confidence: 99%

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Robust measurement of orbital angular momentum of a partially coherent vortex beam under amplitude and phase perturbations

Zhang,

Li,

Liu

et al. 2024

OES

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The ability to overcome the negative effects, induced by obstacles and turbulent atmosphere, is a core challenge of longdistance information transmission, and it is of great significance in free-space optical communication. The spatial-coherence structure, that characterizes partially coherent fields, provides a new degree of freedom for carrying information. However, due to the influence of the complex transmission environment, the spatial-coherence structure is severely damaged during the propagation path, which undoubtedly limits its ability to transmit information. Here, we realize the robust far-field orbital angular momentum (OAM) transmission and detection by modulating the spatial-coherence structure of a partially coherent vortex beam with the help of the cross-phase. The cross-phase enables the OAM information, quantified by the topological charge, hidden in the spatial-coherence structure can be stably transmitted to the far field and can resist the influence of obstructions and turbulence within the communication link. This is due to the self-reconstruction property of the spatial-coherence structure embedded with the cross-phase. We demonstrate experimentally that the topological charge information can be recognized well by measuring the spatial-coherence structure in the far field, exhibiting a set of distinct and separated dark rings even under amplitude and phase perturbations. Our findings open a door for robust optical signal transmission through the complex environment and may find application in optical communication through a turbulent atmosphere.

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Section: Theoretical Model For a Pclg Beam And Computational Propagat...mentioning

confidence: 99%

Section: Theoretical Model For a Pclg Beam And Computational Propagat...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Robust measurement of orbital angular momentum of a partially coherent vortex beam under amplitude and phase perturbations

Zhang,

Li,

Liu

et al. 2024

OES

Self Cite

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“…Based on Eqs. (12)(13)(14), we could produce PCBs belonging to either the Schell-model or non-Schell-model type and those with different optical statistics. The beam transmitted through the second beam splitter (BS2) arrived at the charge-coupled device (CCD1).…”

Section: Experimental Demonstrationmentioning

confidence: 99%

Measurement of optical coherence structures of random optical fields using generalized Arago spot experiment

Liu¹,

Chen²,

Zeng³

et al. 2023

OES

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The optical coherence structures of random optical fields can determine beam propagation behavior, light-matter interactions, etc. Their performance makes a light beam robust against turbulence, scattering, and distortion. Recently, we proposed optical coherence encryption and robust far-field optical imaging techniques. All related applications place a high demand on precision in the experimental measurements of complex optical coherence structures, including their real and imaginary parts. Past studies on these measurements have mainly adopted theoretical mathematical approximations, limited to Gaussian statistic involving speckle statistic (time-consuming), or used complicated and delicate optical systems in the laboratory. In this study, we provide: a robust, convenient, and fast protocol to measure the optical coherence structures of random optical fields via generalized Arago (or Poisson) spot experiments with rigorous mathematical solutions. Our proposal only requires to capture the intensity thrice, and is applicable to any optical coherence structures, regardless of their type or optical statistics. The theoretical and experimental results demonstrated that the real and imaginary parts of the structures could be simultaneously recovered with high precision. We believe that such a protocol can be widely employed in phase measurement, optical imaging, and image transfer.

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“…PCBs in the temporal domain have been developed for laser drivers due to their ability to reduce nonlinear effects such as chirps and improve the uniformity of the optical field [20,21] . PCBs in the spatial domain have proven to be efficient in suppressing speckles caused by spatial coherence, such as optical imaging, particle trapping, and image transmission in the linear regime [22][23][24][25][26][27][28][29] . In the nonlinear regime [30,31] , WBSF of spatially PCBs was studied by Hunt and Brown et al in 1978 [32] .…”

Section: Introductionmentioning

confidence: 99%

Theory of small-scale self-focusing of spatially partially coherent beams and its implications for high-power laser systems

Wang,

Zhang,

Zhang

et al. 2024

High Pow Laser Sci Eng

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Based on the paraxial wave equation, this study extends the theory of small-scale self-focusing (SSSF) from coherent beams to spatially partially coherent beams (PCBs) and derives a general theoretical equation that reveals the underlying physics of the reduction in the B-integral of spatially PCBs. From the analysis of the simulations, the formula for the modulational instability (MI) gain coefficient of the SSSF of spatially PCBs is obtained by introducing a decrease factor into the formula of the modulational instability (MI) gain

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Robust Far-Field Optical Image Transmission with Structured Random Light Beams

Cited by 33 publications

References 64 publications

Robust measurement of orbital angular momentum of a partially coherent vortex beam under amplitude and phase perturbations

Robust measurement of orbital angular momentum of a partially coherent vortex beam under amplitude and phase perturbations

Measurement of optical coherence structures of random optical fields using generalized Arago spot experiment

Theory of small-scale self-focusing of spatially partially coherent beams and its implications for high-power laser systems

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