Extended Data Fig. 2: Diagram of the laser source layout.
From: Dynamic optical response of solids following 1-fs-scale photoinjection
The output of the Ti:Sa oscillator is guided through the CEP4 module (Femtolasers) for CEP stabilization (Stage I carrier-envelope phase stabilization). The transmitted pulse is amplified in a chirped-pulse amplifier (Ti:CPA). The amplified pulse is guided into the hollow core fiber filled with neon gas. The beam is coupled into the fiber following active stabilization. After the hollow core fiber, the beam passes through three pairs of chirped mirrors (Ultrafast Innovations) which compensate for the spectral phase of the incident pulse as well as the additional dispersion of the experimental setup. In front of the compressor, an outcoupling mirror reflects a small fraction of the beam into the second stage of the carrier-envelope phase stabilization, which is based on the f-2f scheme.
