Recent results from the JILA 87Sr optical lattice clock are presented. Using the tight confinement of an optical lattice in
combination wit a sub-Hz linewidth diode laser we have achieved a pulse-length limited linewidth of 1.8 Hz for the 1S0-
3P0 clock transition. This corresponds to a quality factor of Q ≈ 2.4 x 1014, and is a record for coherent spectroscopy.
With the addition of a small magnetic bias field, the high line Q of the clock transition has also allowed us to resolve the
nuclear-spin sublevels, and make a precision measurement of the differential Landé g-factor between the 1S0 and 3P0. We
present the current accuracy and stability of the lattice clock, and in addition, we report on our development of precision
tools for the lattice clock, including a stabilized clock laser, fs-comb based technology allowing accurate clock
comparison in both the microwave and optical domains, and clock transfer over an optical fiber in an urban environment.
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