Nonlinear optics with phase-controlled pulses in the sub-two-cycle regime.
Nonlinear optical effects due to the phase between carrier and envelope are observed with 5 fs pulses from a Kerr-lens mode-locked Ti:sapphire laser. These sub-two-cycle pulses with octave spanning spectra are the shortest pulses ever generated directly from a laser oscillator. Detection of the carrier-envelope phase slip is made possible by simply focusing the short pulses directly from the oscillator into a BBO crystal. As a further example of nonlinear optics with such short pulses, the interference between second- and third-harmonic components is also demonstrated.
Morgner
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High Frequency and Quantum Electronics Laboratory, University of Karlsruhe, Engesserstrasse 5, D-76128 Karlsruhe, Germany.
Ell
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Metzler
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Schibli
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Kärtner
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Fujimoto
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JG
Haus
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Ippen
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