Fresnel Lens for the Generator of Encoded Sequences of Ultrashort Pulses. The Spectral Evidence of Series of Pulses Formation

摘要

Fresnel lens is considered as the effective instrument for the transformation of a single femtosecond pulse into a series of pulses corresponding to some digital code. The theory describing transformation of spectrum of a finite series of equidistant pulses is developed and compared with experimental data received for two Fresnel lens patterns. Accordance of the measured and calculated spectra confirmed the basic idea of pulse transformation method.