Self-Referenced 200 MHz Octave-Spanning Ti:Sapphire Laser with 50 Attosecond Carrier-Envelope Phase Jitter

Abstract

Carrier-envelope phase stabilization of a 200MHz octave-spanning Ti:sapphire laser without external broadening is demonstrated. The individual comb lines spaced by 200MHz can conveniently be resolved using commercial wavemeters. The accumulated in-loop carrier-envelope phase error (integrated from 2.5 mHz to 10 MHz) using a broadband analog mixer as phase detector is 0.117 rad, equivalent to 50 attosecond carrier-envelope phase jitter at 800 nm.

Dynamics of dispersion managed octave-spanning titanium:sapphire lasers

“…1(a) for a ring and in Fig. 1(c) for a linear laser: In this work, we focus on prismless Ti:sapphire laser cavities that directly generate octave-spanning output spectra at low and high repetition rates [21,22,23,24,25]. All lasers developed in our group use custom-designed, double-chirped mirror (DCM) pairs, thereby enabling broadband dispersion compensation over almost one octave.…”

“…The numerical model is applied to laser configurations found in the literature, which are referenced for details: a linear 200 MHz laser [22], a 500 MHz ring laser [21,23,24] and a 1 GHz ring laser [25]. Using the 500 MHz ring laser as an example, the important cavity elements in this experimental set-up are explained.…”

“…4(a) the output spectrum for the linear 200 MHz laser from the experimental setup and simulation is presented, and the numerical analysis predicts the output spectrum shape accurately. The ZnSe/MgF 2 output coupler enhances the wings relative to the main output, and the power transmission for the center wavelengths is 1% (see [22]). …”

Towards high-performance optical master oscillators for energy recovery linacs

“…Thus, an octavespanning spectrum is needed. This can be achieved by either using external spectral broadening of the output of a fiber or solid-state laser in a microstructure fiber [21,22] or a special Ti:sapphire laser built to generate an octave-spanning spectrum [23,25]. A typical experimental setup to generate the stabilization signal is shown in Figure 5.…”

A spatially and temporally localized sub-laser cycle electron source

“…For our experimental conditions, this corresponds to electron emission times of around 660 as. Because CE phase stabilized lasers have been shown to possess a timing jitter of down to 40 as [21,22], the timing jitter of the electron emission lies well in the attosecond domain. Evidently, a finite initial energy spread and Coulomb repulsion will lead to a loss of timing accuracy.…”