Synthesis of picosecond pulses by spectral compression and shaping of femtosecond pulses in engineered quadratic nonlinear media.
Narrow-bandwidth picosecond pulses of predetermined spectral and temporal shapes are generated with high efficiency by frequency conversion of femtosecond pulses in lithium tantalate crystals with engineered quasi-phase-matching structures. We give examples of the synthesis of Gaussian and super-Gaussian picosecond pulses and also of a pair of synchronized phase-coherent picosecond pulses with a predetermined carrier-frequency difference.
Marangoni
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Dipartimento di Fisica-Politecnico di Milano, ULTRAS Istituto Nazionale per la Fisica delle Materia-Consiglio Nazionale delle Ricerche, Milano, Italy. marco.marangoni@polimi.it
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