  The unusually large hyperfine structure splittings in the 23P state of the
3He isotope is measured using electro-optic techniques with high precision
laser spectroscopy. Originally designed to probe the fine structure of the 4He
atom, this experimental setup along with special modifications I implemented to
resolve certain 3He related issues has made possible new high precision
hyperfine structure measurements. Discussed are the details of the experimental
setup and the modifications, including in depth information necessary to
consider while performing these measurements. The results of these hyperfine
structure measurements give an order of magnitude improvement in precision over
the best previously reported values.
