PeterK, RickS

Today, we installed a periscope that allows us to sample the 35-W FrondEnd output relatively close to the laser output aperture (see attached photo) and measure the beam profile using a rail mounted on top of the FrontEnd box.

The beam parameters (waist size and location) estimated from least-squares fits to the data of gaussian beam propagation are shown in the attached plots as well as beam profiles measured with the ThorLabs BeamScan instrument both at the beginning of the rail (1 cm) and at the back of the rail (50 cm) are also attached.