Abstract

The recent progress in the development of few-cycle laser pulses with passively stabilized carrier-envelope phase (CEP) at SIOM is reported. A three-stage high conversion efficiency optical parametric amplifier (OPA) with passively stabilized carrier-envelope phase is shown. After passing through an argon-filled hollow fiber and the dispersion compensator for pulse compression, CEP stabilized 0.7 mJ, 1.5 cycle laser pulses at \(1.75\mu \mathrm{m}\) center wavelength are obtained. Applications of the laser system in high order harmonic generation leading to the short wavelength supercontinuum emission and the terahertz (THz) generation with a pronounced CEP dependence will be discussed. THz emission spectroscopy is adopted also to determine the value of CEP, indicating an excellent long-term CEP stability.

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