Tajahuerce E, Saavedra G, Furlan WD, Sicre EE, Andrés P. White-light optical implementation of the fractional fourier transform with adjustable order control.
APPLIED OPTICS 2000;
39:238-245. [PMID:
18337891 DOI:
10.1364/ao.39.000238]
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Abstract
An optical implementation of the fractional Fourier transform (FRT) with broadband illumination is proposed by use of a single imaging element, namely, a blazed diffractive lens. The setup displays an achromatized version of the FRT of order P of any two-dimensional input function. This fractional order can be tuned continuously by shifting of the input along the optical axis. Our compact and flexible configuration is tested with a chirplike input signal, and the good experimental results obtained support the theory.
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