  We propose a novel approach for strong alignment of gas-phase molecules for
experiments at arbitrary repetition rates. A high-intracavity-power
continuous-wave laser will provide the necessary ac electric field of
$\!10^{10}$- $10^{11}~\text{W}/\text{cm}^2$. We demonstrate thin-disk lasers
based on Yb:YAG and Yb:Lu$_2$O$_3$ in a linear high-finesse resonator providing
intracavity power levels in excess of 100~kW at pump power levels on the order
of 50~W. The multi-longitudinal-mode operation of this laser avoids
spatial-hole burning even in a linear standing-wave resonator. The system will
be scaled up as in-vacuum system to allow for the generation of fields of
$10^{11}~\text{W}/\text{cm}^2$. This system will be directly applicable for
experiments at modern X-ray light sources, such as synchrotrons or
free-electron lasers, which operate at various very high repetition rates. This
would allow to record molecular movies through temporally resolved diffractive
imaging of fixed-in-space molecules, as well as the spectroscopic investigation
of combined X-ray-NIR strong-field effects of atomic and molecular systems.
