Spectral properties of partially coherent chirped Airy pulsed beam in oceanic turbulence

Using the coherence theory of non-stationary fields and the method of Fourier transform, the spectral properties of spatially and spectrally partially coherent Gaussian Schell-model pulsed (GSMP) beams in fused-silica glass medium are studied and analyzed numerically. It is shown that the spectral shift takes place, which depends on the position of the field point, spatial correlation length, temporal coherence length and dispersive property of medium, as GSMP beams propagate in fused-silica glass medium. The on-axis spectrum is blue-shifted, and the relative spectral shift increases with increasing propagation distance, and decreases as the spatial correlation length and temporal coherence length increases, and then approaches an asymptotic value. The dispersive property of medium plays an important role in the spectral properties of spatially and spectrally partially coherent beams.

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Analysing the behaviour of partially coherent divergent Gaussian beams propagating through oceanic turbulence

Journal of Modern Optics ◽

10.1080/09500340.2014.940016 ◽

2014 ◽

Vol 61 (17) ◽

pp. 1430-1441 ◽

Cited By ~ 10

Author(s):

M. Yousefi ◽

F.D. Kashani ◽

Sh. Golmohammady ◽

E. Kazemian ◽

B. Ghafary

Keyword(s):

Gaussian Beams ◽

Oceanic Turbulence ◽

Partially Coherent

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Propagation properties of radially polarized partially coherent beam in the oceanic turbulence

14th National Conference on Laser Technology and Optoelectronics (LTO 2019) ◽

10.1117/12.2533705 ◽

2019 ◽

Author(s):

Jie Zhou ◽

Xiao Yuan ◽

Xiang Zhang ◽

Fan Gao ◽

Baoxing Xiong

Keyword(s):

Coherent Beam ◽

Oceanic Turbulence ◽

Partially Coherent ◽

Propagation Properties ◽

Radially Polarized

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Ghost Imaging with a Partially Coherent Beam Carrying Twist Phase in a Turbulent Ocean: A Numerical Approach

Applied Sciences ◽

10.3390/app9153023 ◽

2019 ◽

Vol 9 (15) ◽

pp. 3023 ◽

Cited By ~ 1

Author(s):

Yonglei Liu ◽

Xianlong Liu ◽

Lin Liu ◽

Fei Wang ◽

Yuping Zhang ◽

...

Keyword(s):

Numerical Approach ◽

Coherent Beam ◽

Ghost Imaging ◽

Oceanic Turbulence ◽

Partially Coherent ◽

Rytov Approximation ◽

Twist Factor ◽

Imaging Approach ◽

Optical Paths

Ghost imaging (GI) is an indirect imaging approach that can retrieve an object’s image even in a harsh environment through measuring the fourth-order correlation function (FOCF) between the signal and idle optical paths. In this paper, we study lensless GI with a partially coherent beam carrying twist phase, i.e., twisted Gaussian Schell-model (TGSM) beam, in the presence of oceanic turbulence. Explicit expression of the FOCF is derived based on the optical coherence theory and Rytov approximation, and the effects of the twist phase and the oceanic turbulence on the quality and visibility of image are investigated in detail through numerical examples. Our results show that the simulated oceanic turbulence strongly affects the GI. The quality of image decreases monotonously with an increase of the strength of turbulence whereas the visibility increases. When the illumination light carries a twist phase, the visibility of the image is improved while the quality of the image is reduced in contrast to those without a twist phase. By properly selecting the strength of the twist phase, the image can still be maintained at an acceptable level of quality with high visibility. Furthermore, it is found that the quality and visibility of the ghost image are less affected by the oceanic turbulence using a TGSM beam with larger twist factor. Our findings will be useful for the application of GI in an oceanic turbulent environment.

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