Abstract

Direct amplitude and phase shaping of mid-infrared femtosecond pulses is realized with a calomel-based acousto-optic programmable dispersive filter transparent between 0.4 and 20μm. The shaped pulse electric field is fully characterized with high accuracy, using chirped-pulse upconversion and time-encoded arrangement spectral phase interferometry for direct electric field reconstruction techniques. Complex mid-infrared pulse shapes at a center wavelength of 4.9μm are generated with a spectral resolution of 14cm1, which exceeds by a factor of 5 the reported experimental resolutions of calomel-based filters.

© 2010 Optical Society of America

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