UV Optical Fibers and Fluorescence Laser Spectroscopy

Advances in Nuclear Physics have been happening rapidly thanks to new accelerator facilities being built. One of the most important is the Facility for Rare Isotopes (FRIB) at Michigan State University. At FRIB, the BEam COoling and LAser spectroscopy (BECOLA) group performs high-resolution optical measurements to provide model-independent nuclear data which are used to test state of the art theoretical calculations. In order to produce high quality data, resolution and sensitivity are crucial. This contribution will summarize recent achievements in developing a new approach to the fluorescent technique for laser spectroscopy. The use of optical fibers to couple UV light further reducing background and increasing the quality of the laser beam profile have been studied in the pursuit of higher sensitivity. The importance of optical fibers will be highlighted by presenting a new measurement of fluorescence laser spectroscopy on 232Th ions.