The Study On Properties Of Composite Tunable Airy-like Beams

The Airy beam is a self-accelerating beam along the parabolic trajectory.It was predicted by the theory in 1979 and was not experimentally implemented until 2007.The studies show that Airy beam,which not only has self-accelerating property,but also has non-diffraction and self-healing characteristics,can be widely used in particle manipulation,optical clearing,light bullet,curved plasma channel and so on,making it drew wide attention.In recent years,based on the theory of Airy beam,combined with other types of special beam,people have creatively developed a large number of new self-accelerating beams,and have greatly enriched the connotation of the self-accelerating beam.Base on that,the discrete rotating beam is introduced into the continuous Airy beam in this paper,and utilizing of the inverse Fourier transform method,a new type of self-accelerating beam-"composite tunable Airy-like beam" is successfully produced.We also generate the twins composite tunable Airy-like beam by binary phase method,and such twins beam's spatial distribution can be adjusted by using the linear phase.The thesis is outlined as follows:Chapter 1,Introduction.The development of self-accelerating beam is introduced,we mainly focus on the fundamental theory?properties and fabrication methods of the Airy beam.Furthermore,we also briefly introduce other types of self-accelerating beam.Chapter 2,The study of the composite tunable Airy-like beam.In this chapter,we firstly combine the phase of the discrete rotating beam with the cubic phase of the Airy beam to build the phase model of the composite tunable Airy-like beam,and the distribution of the initial light field is studied by inverse Fourier transform method;Then,the propagation property and the self-healing characteristic of the composite tunable Airy-like beam are studied numerically by the Fresnel diffraction integral,which is experimentally demonstrated by combining the digital holography with inverse Fourier transform.Finally,the influence of the radial parameter N and the angular parameter ?L on the distribution of the light intensity of the composite tunable Airy-like beam is studied.Chapter 3,The study of the twins composite tunable Airy-like beam.On the basis of the research results in Chapter 2,the binary phase method and the linear phase perturbation method are used to construct phase model of the twins composite tunable Airy-like beam,and we study the distribution of the initial light field by inverse Fourier transform method.The propagation of this beam is studied both numerically and experimentally.Finally,we investigate the influence of the linear parameter s?the radial parameter N and the angular parameter ?L on the distribution of the light intensity of the composite tunable Airy-like beam.Chapter 4,Conclusion.We systematically summarize all the research content of this paper in this chapter and indicate the follow-up working plans combined the latest research results.