Continuous axial scanning of a Gaussian beam via beam steering
PAULINE BOUCHER,*,1,2 NICOLAS BARRÉ,2 OLIVIER PINEL,2 GUILLAUME LABROILLE,2 AND NICOLAS TREPS1 1Laboratoire Kastler Brossel, UPMC – Sorbonne Universités, CNRS, ENS-PSL Research University, Collège de France – 4 place Jussieu, Paris, France 2CAILabs – 38 Boulevard Albert 1er, Rennes, France
Abstract: We propose and demonstrate experimentally the transfer of one spatial degree of freedom of a laser beam onto another one. Using a multi-plane light conversion device (MPLC) and a modal analysis, we designed a passive setup with immediate response which couples a displacement and tilt in the transverse plane to a longitudinal shift of the focus point of a beam. With this design, we demonstrated a shift of the focal point of the output beam by 4 zR along the propagation axis.