Improved stability of a 87 Sr three-dimensional optical lattice clock

Optical clocks with high accuracy and stability play an essential role in a wide range of technological and scientific applications. A ${}^{87}$Sr three-dimensional optical lattice clock has recently demonstrated record-breaking stability due to its large atom number and long coherence time. This performance can be further improved by decreasing the dead time and realizing a longer coherence time. Through improved loading of the optical trap, we have reduced the duration of our evaporative cooling from 10 s to 3 s while maintaining T/T$_{F}$=0.05. We also describe a new optical lattice clock geometry for improving the atomic coherence time that has previously been limited by Raman scattering induced by optical lattice beams.