Abstract
Average Bit Error Rate (BER) expression of free-space optical (FSO) communication links with Airy beam as signal carrier under weak atmospheric turbulence and on–off keying modulation scheme is derived based on scintillation index of Airy beam and Exponentiated Weibull channel model. The average BER has been evaluated at different transverse scale factors and exponential decay factors of Airy beam and link distances. And comparison of the average BER of FSO links with Airy beam and Gaussian beam as signal carrier has been carried out. The simulation results show that the average BER of FSO links with Airy beam as carrier decreases with the increase of mean signal to noise ratio and increases with the increase of transmission distance. When the transverse scale factor is about 1.5 cm, a lower average BER can be obtained. And the smaller the exponential decay factor is, the lower the average BER is. Under the same atmospheric turbulence condition, the average BER of FSO links with Airy beam as carrier is obviously better than that of FSO links with Gaussian beam as carrier. The results of this research have some significance for the application of Airy beam in FSO system.
Highlights
Free-space optical (FSO) communication is a promising communication technology for high-data-rate information transmission that is available at optical frequencies[1][2]
Based on scintillation index model of Airy beam and Exponentiated Weibull (EW) channel model, we derived the expression of the average Bit Error Rate (BER) of FSO link with Airy beam as carrier
The results show that the average BER of FSO with Airy beam as carrier decreases with the increase of mean signal to noise ratio (SNR) and increases with the increase of transmission distance
Summary
Free-space optical (FSO) communication is a promising communication technology for high-data-rate information transmission that is available at optical frequencies[1][2]. For FSO links using Gaussian beam as signal carrier, beam spreading and atmospheric turbulence are two mainly factors that deteriorate their performances , over link distance of 1km or longer[3][4]. Compared with the traditional Gaussian beam, Airy beam can keep its transverse intensity distribution invariant over a longer propagation distance and has a smaller scintillation index[10][11]. These features make Airy beam has potential applications in optical communication and optical design to reduce diffractive spreading and the effects of atmospheric turbulence. This research has certain significance for extending the application of Airy light to FSO communication field
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