White-light optical implementation of the fractional fourier transform with adjustable order control.
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.
Tajahuerce
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E
Departamento de Ciencias Experimentales, Universitat Jaume I, E-12080 Castelló, Spain.
Saavedra
G
G
Furlan
W D
WD
Sicre
E E
EE
Andrés
P
P