We demonstrate frequency-resolved optical gating (FROG) for measuring the full intensity and phase of several-optical-cycle 1.5-m pulses generated from a Kerr-lens mode-locked (KLM) Cr4+:YAG laser. This involves the use of an angle-dithered second-harmonic-generation crystal to achieve the full pulse bandwidth despite the use of a relatively thick nonlinear crystal.

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http://dx.doi.org/10.1364/oe.11.003461DOI Listing

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