چکیده :

The generation of pure third-order spatial phase is the top requirement for the generation of Airy beams through the Fourier-space beam shaping method. Utilizing coma aberration for inducing such a phase profile is shown to be one of the most appropriate approaches because of providing continuous phase, the capability of working at high laser powers, and low costs. Here, we demonstrate pure tunable third-order spatial generation through aberration control in a positive one-dimensional tilted cylindrical telescopic system, and experimentally verify its quality and tunability by two independent wavefront sensing methods namely moir\'{e} deflectometry and four-step phase-shifting interferometry. The deflectometry method is used for a real-time visual assessment of the quality of the imprinted wavefront, and also for a quantitive analysis of the wavefront and its dependency on the parameters of the system, while, the interferometric method is used for a more rigorous measurement of the generated wavefront. It is shown that by changing the tilt angle of the system, the modulation depth of the cubic phase can be tuned. It is also shown that nearly-complete third-order form of the imprinted phase over a large aperture results in high-quality Airy beam generation with a small truncation factor.

کلید واژگان :

Moiré techniques; Airy beam



ارزش ریالی : 500000 ریال
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