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In the last decade, the measurement and stabilization of the carrier-envelope phase has become a mature technology, which offers diverse applications in the fields of frequency metrology and attosecond physics. The most limiting aspects of this technology are the achievable residual phase jitter and the long-term stability. The present thesis is dedicated to improvements of the carrier-envelope phase stabilization in response to these aspects. In order to realize such improvements, the fundamental noise sources are identified, and suitable measures for their reduction are proposed. It is shown that both, the measurement of the carrier-envelope phase as well as its control are corrupted by different noise contributions. On the one hand, the detection process is influenced by technical noise sources, which arise especially in the used nonlinear interferometers. It is demonstrated how such limitations can be minimized by a suitable choice of the interferometer topology. On the other hand, the detection noise in the electrooptic conversion represents a fundamental limitation, since the optical shot noise as well as the noise induced by the light detector inevitably influence the measurement of the carrier-envelope phase. A reduction of these constraints is solely achieved for higher detected light fluences, which are quantified in the framework of numerical calculations. On the basis of a numerical optimization of the spectral broadening process in a micro-structured fiber, an enormous improvement of the signal-to-noise ratio by 20 dB is obtained experimentally, which significantly reduces the limitation of detection noise. So far, the best stabilization results have been achieved with a feed-forward approach, which is based on an acousto-optical frequency shifter. This technique, however, suffers from several constraints that are mainly caused by varying dynamics of the carrier-envelope phase in oscillator pulse trains. A novel double stabilization scheme solves this issue by combining the feed-forward stabilization with a classical feedback loop. This method enabled a reduction of the residual phase jitter to an unprecedented value of 20milliradians, which corresponds to temporal fluctuations of the carrier-wave with respect to the envelope of only 8 attoseconds. Beyond that, several further concepts are introduced that are capable of stabilizing the CEP without any feedback to the laser oscillator. One of these concepts, referred to as the acoustic frequency comb, represents a pulsed feed-forward stabilization, which is specifically designed for the use in combination with a subsequent amplification stage. First experimental results indicate that residual phase jitters of less than 100milliradian are within reach also for amplified laser systems.

Pushing frontiers in Carrier-Envelope Phase stabilization of ultrashort laser pulses