Effect of angle-of-arrival fluctuation on heterodyne detection in slant atmospheric turbulence

Ke, Xizheng; Tan, Zhenkun

doi:10.1364/ao.57.001083

Cited by 19 publications

(7 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the approximation expression of the WSF for the plane waves defined in Equation (19), the new SCR expression of plane waves for the case of L 0 = ∞ is derived, and it is defined as follows:…”

Section: New Expressions For Spatial Coherence Radiusmentioning

confidence: 99%

“…The anisotropic factor is also used to describe anisotropy of the atmosphere turbulence [7], and the generalized non-Kolmogorov von Karman spectrum of the anisotropic atmospheric turbulence is available [8][9][10]. In addition, there are also numerous studies on beam wanders, loss of spatial coherence, temporal frequency spread, and the angle of arrival fluctuation [14][15][16][17][18][19][20][21], which are all related to the random fluctuation of optical waves propagating through random media.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spatial Property of Optical Wave Propagation through Anisotropic Atmospheric Turbulence

Guan

Song

et al. 2021

Wireless Communications and Mobile Computing

View full text Add to dashboard Cite

For the free-space optical (FSO) communication system, the spatial coherence of a laser beam is influenced obviously as it propagates through the atmosphere. This loss of spatial coherence limits the degree to which the laser beam is collimated or focused, resulting in a significant decrease in the power level of optical communication and radar systems. In this work, the analytic expressions of wave structure function for plane and spherical wave propagation through anisotropic non-Kolmogorov turbulence in a horizontal path are derived. Moreover, the new expressions for spatial coherence radius are obtained considering different scales of atmospheric turbulence. Using the newly obtained expressions for the spatial coherent radius, the effects of the inner scales and the outer scales of the turbulence, the power law exponent, and the anisotropic factor are analyzed. The analytical simulation results show that the wave structure functions are greatly influenced by the power law exponent α , the anisotropic factor ζ , the turbulence strength σ ~ R 2 , and the turbulence scales. Moreover, the spatial coherence radiuses are also significantly affected by the anisotropic factor ζ and the turbulence strength σ ~ R 2 , while they are gently influenced by the power law exponent α and the inner scales of the optical waves.

show abstract

Section: New Expressions For Spatial Coherence Radiusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spatial Property of Optical Wave Propagation through Anisotropic Atmospheric Turbulence

Guan

Song

et al. 2021

Wireless Communications and Mobile Computing

View full text Add to dashboard Cite

show abstract

“…It is well known that optical heterodyne (coherent) detection technology is widely used in free-space optical communications (FSOCs), broadcasting, radar systems and other fields since the reception sensitivity of this technology is nearly 20 dB higher than that of intensity modulation/direct detection methods [1][2][3][4][5]. Heterodyne detection has been widely used in satellite-satellite [6], satellite-ground [7,8] and ground-ground [9] communication links in recent decades.…”

Section: Introductionmentioning

confidence: 99%

An Effective Method for Enhancing Heterodyne Efficiency by Comparing the Effect of Degree of Polarization on an Uplink Path and a Downlink Path

et al. 2022

Self Cite

View full text Add to dashboard Cite

By analyzing the effect of the degree of polarization (DoP) of the partially coherent Gaussian Schell-model (GSM) beam on a heterodyne system of an uplink path and a downlink path, we developed an innovative and noteworthy theory according to which σsy (signal beam waist radius in the y direction component) and δSyy (coherence length of the signal beam in the yy direction component) had a more significant impact on heterodyne efficiency and DoP than the turbulence term on uplink and downlink paths. Namely, the DoP and heterodyne efficiency of an uplink path are higher than that of a downlink path when σsy > 0.02 m or δSyy ≥ 0.03 m. This innovative rule provides an efficient way for increasing the heterodyne efficiency of a signal beam propagating along an uplink or a downlink path channel in satellite-ground communication links in free-space optical heterodyne detection communication.

show abstract

“…Toselli is one of them and he analyzes the angle of arrival fluctuations by using the generalized exponent factor α instead of the standard exponent value 11/3 [5] and the anisotropic factor is also used to describe the anisotropy of the atmosphere turbulence [6]. In addition, there are also numerous studies on beam wanders, loss of spatial coherence, and the angle of arrival fluctuation [10][11][12][13][14], which are all related to the random fluctuation of optical waves propagating through terrestrial turbulence.…”

Section: Introductionmentioning

confidence: 99%

Wave Structure Function and Long-Exposure MTF for Gaussian-Beam Waves Propagating in Anisotropic Maritime Atmospheric Turbulence

Guan

Song

et al. 2020

Applied Sciences

View full text Add to dashboard Cite

The expressions of wave structure function (WSF) and long-exposure modulation transfer function (MTF) for laser beam propagation through non-Kolmogorov turbulence were derived in our previous work. In this paper, based on anisotropic maritime atmospheric non-Kolmogorov spectrum, the new analytic expression of WSF for Gaussian-beam waves propagation through turbulent atmosphere in a horizontal path is derived. Moreover, using this newly derived expression, long-exposure MTF for Gaussian-beam waves is obtained for analyzing the degrading effects in an imaging system. Using the new expressions, WSF and MTF for Gaussian-beam waves propagating in terrestrial and maritime atmospheric turbulence are evaluated. The simulation results show that Gaussian-beam waves propagation through maritime turbulence obtain more degrading effects than terrestrial turbulence due to the humidity and temperature fluctuations. Additionally, the degrading effects under anisotropic turbulence get less loss than that of isotropic turbulence.

show abstract

Effect of angle-of-arrival fluctuation on heterodyne detection in slant atmospheric turbulence

Cited by 19 publications

References 15 publications

Spatial Property of Optical Wave Propagation through Anisotropic Atmospheric Turbulence

Spatial Property of Optical Wave Propagation through Anisotropic Atmospheric Turbulence

An Effective Method for Enhancing Heterodyne Efficiency by Comparing the Effect of Degree of Polarization on an Uplink Path and a Downlink Path

Wave Structure Function and Long-Exposure MTF for Gaussian-Beam Waves Propagating in Anisotropic Maritime Atmospheric Turbulence

Contact Info

Product

Resources

About