TY - JOUR
KW - frequency drift
KW - optical cavity
KW - optical lattice clock
KW - ultrastable lasers
AU - John Robinson
AU - Eric Oelker
AU - William Milner
AU - Wei Zhang
AU - Thomas Legero
AU - Dan-Gheorghita Matei
AU - Fritz Riehle
AU - Uwe Sterr
AU - Jun Ye
AB - Crystalline optical cavities are the foundation of today\textquoterights state-of-the-art ultrastable lasers. Building on our previous silicon cavity effort, we now achieve the fundamental thermal-noise-limited stability for a 6\&nbsp;cm long silicon cavity cooled to 4\&nbsp;K, reaching\&nbsp;6.5\texttimes10<sup>-17</sup> from 0.8\&nbsp;s to 80\&nbsp;s. We also report for the first time, to the best of our knowledge, a clear linear dependence of the cavity frequency drift on incident optical power. The lowest fractional frequency drift of\&nbsp;-3\texttimes10<sup>-19</sup>/s is attained at a transmitted power of 40 nW, with an extrapolated drift approaching zero in the absence of optical power. These demonstrations provide a promising direction to reach a new performance domain for stable lasers, with stability better than\&nbsp;1\texttimes10<sup>-17</sup> and fractional linear drift below\&nbsp;1\texttimes10<sup>-19</sup>/s.
BT - Optica
DA - 2019-01
DO - 10.1364/OPTICA.6.000240
N2 - Crystalline optical cavities are the foundation of today\textquoterights state-of-the-art ultrastable lasers. Building on our previous silicon cavity effort, we now achieve the fundamental thermal-noise-limited stability for a 6\&nbsp;cm long silicon cavity cooled to 4\&nbsp;K, reaching\&nbsp;6.5\texttimes10<sup>-17</sup> from 0.8\&nbsp;s to 80\&nbsp;s. We also report for the first time, to the best of our knowledge, a clear linear dependence of the cavity frequency drift on incident optical power. The lowest fractional frequency drift of\&nbsp;-3\texttimes10<sup>-19</sup>/s is attained at a transmitted power of 40 nW, with an extrapolated drift approaching zero in the absence of optical power. These demonstrations provide a promising direction to reach a new performance domain for stable lasers, with stability better than\&nbsp;1\texttimes10<sup>-17</sup> and fractional linear drift below\&nbsp;1\texttimes10<sup>-19</sup>/s.
PY - 2019
EP - 240
T2 - Optica
TI - Crystalline optical cavity at 4  K with thermal-noise-limited instability and ultralow drift
UR - https://www.osapublishing.org/optica/fulltext.cfm?uri=optica-6-2-240\&id=405188
VL - 6
ER -