Ambiguity function analysis of pulse train propagation: applications to temporal Lau filtering.
We use the periodic-signal ambiguity function for visualizing the intensity-spectrum evolution through propagation in a first-order dispersive medium. We show that the degree of temporal coherence of the optical source plays the role of a low-pass filter on the signal's ambiguity function. Based on this, we present a condition on the temporal Lau effect for filtering harmonics at fractions of the Talbot length. This result allows one to increase the repetition rate of a pulse train obtained from a sinusoidally phase-modulated CW signal.
Ojeda-Castañeda
Jorge
J
Grup de Recerca d'Optica de Castelló, Departament de Física, Universitat Jaume 1, Castelló, Spain.
Lancis
Jesús
J
Gómez-Sarabia
Cristina M
CM
Torres-Company
Víctor
V
Andrés
Pedro
P