CEP-stable Single-Cycle Pulses from a Cr:ZnS Laser

We present generation of 7.5-fs pulses at 2.3 µm driven by a carrier-envelope-phasestabilized diode-pumped Cr:ZnS oscillator. The single-cycle waveforms exhibit exceptional stability with a residual phase jitter of 8.6 mrad (0.2 Hz − 11.4 MHz).