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Opt Lett. 2008 Dec 15;33(24):2901-3.

Two-optical-cycle pulses in the mid-infrared from an optical parametric amplifier.

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  • 1National Laboratory for Ultrafast and Ultraintense Optical Science--INFM-CNR, Dipartimento di Fisica, Politecnico di Milano, Milano, Italy.


Ultrabroadband mid IR pulses with energy as high as 2 microJ and tunability from 2 to 5 microm are generated as the idler beam of an 800 nm pumped optical parametric amplifier in periodically poled stoichiometric lithium tantalate. After bulk compression in a Ge plate and frequency-resolved-opticle-gating characterization, a pulse duration as low as 25 fs was measured, corresponding to two optical cycles of the 3.6 microm carrier wavelength.

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