Tajahuerce E, Saavedra G, Furlan W D, Sicre E E, Andrés P
Departamento de Ciencias Experimentales, Universitat Jaume I, E-12080 Castelló, Spain.
Appl Opt. 2000 Jan 10;39(2):238-45. doi: 10.1364/ao.39.000238.
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.
