E. Tajahuerce et al., White-light optical implementation of the fractional Fourier transform with adjustable order control, APPL OPTICS, 39(2), 2000, pp. 238-245
An optical implementation of the fractional Fourier transform (FRT) with br
oadband 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 o
rder can be tuned continuously by shifting of the input along the optical a
rris. Our compact and flexible configuration is tested with a chirplike inp
ut signal, and the good experimental results obtained support the theory. (
C) 2000 Optical Society of America OCIS codes: 070.6020, 100.0100, 050.1940
, 070.2580.