Abstract
The spectral and coherent properties of partially polarized pulsed electromagnetic beams propagating in a horizontal homogeneous and isotropic turbulent atmosphere channel for different source conditions are investigated in detail. Based on the extended Huygens–Fresnel principle and von Karman power spectrum, the analytical expressions for the elements of the two-frequency cross spectral density matrix, the average spectral intensity, the beam width, and the spectral degree of electromagnetic coherence are derived in turn. Finally, with the help of numerical calculations, the effects of different source conditions on the changes in the beam width, spectral and coherent properties of partially polarized pulsed Gaussian Schell-model electromagnetic beams are studied. Some theoretical results in this paper will be useful for applications involving polarized pulsed electromagnetic beams propagating through atmospheric turbulence.
Highlights
In the past decades, with the rapid development of femtosecond pulse laser technology, ultrashort pulse beam has aroused great interests of scholars at home and abroad [1,2,3,4,5,6]
The average spectral intensity for the partially polarized pulsed electromagnetic Gaussian Schell-model (PEGSM) beam is determined in Eq (15), and the change in the spectral property on propagation in a homogeneous and isotropic turbulent atmosphere is studied by choosing different source conditions parameters σi, δij and Tcij, refractive index structure constant Cn2, and turbulence inner scale l0
To evaluate the preceding analysis, we show the detailed variations of propagation properties parameters in a horizontal homogeneous and isotropic turbulent atmosphere channel
Summary
With the rapid development of femtosecond pulse laser technology, ultrashort pulse beam has aroused great interests of scholars at home and abroad [1,2,3,4,5,6]. It is commonly assumed that both its spatial and spectral components are completely coherent. Such assumption does not stand in practice, i.e., the spatial and spectral distributions of optical pulses are usually partially coherent, which represent a class of partially coherent non-stationary wave field [7, 8]. There has been numerous interests in studying the spectral, coherent, and polarization properties, etc., of stochastic electromagnetic (pulse) beams on propagation through different kinds of random mediums, such as a gradient-index fiber [23], an optical system [24, 25], dispersive media [26], free space [27,28,29], turbulent atmosphere [30], and oceanic turbulence [31]. To the best of our knowledge, rarely the references are concerned with the context of propagation properties of the partially polarized, partially spatially and
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