Thu Aug 14, F. Flechtner
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Rees, Emily Rose, Wade, Andrew R., Sutton, Andrew J., Spero, Robert E., Shaddock, Daniel A., and Mckenzie, Kirk, 2021. Absolute frequency readout derived from ULE cavity for next generation geodesy missions. Optics Express, 29(16):26014, doi:10.1364/OE.434483.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2021OExpr..2926014R,
author = {{Rees}, Emily Rose and {Wade}, Andrew R. and {Sutton}, Andrew J. and {Spero}, Robert E. and {Shaddock}, Daniel A. and {Mckenzie}, Kirk},
title = "{Absolute frequency readout derived from ULE cavity for next generation geodesy missions}",
journal = {Optics Express},
year = 2021,
month = aug,
volume = {29},
number = {16},
pages = {26014},
abstract = "{The next generation of Gravity Recovery and Climate Experiment
(GRACE)-like dual-satellite geodesy missions proposals will rely
on inter-spacecraft laser interferometry as the primary
instrument to recover geodesy signals. Laser frequency stability
is one of the main limits of this measurement and is important
at two distinct timescales: short timescales over 10-1000
seconds to measure the local gravity below the satellites, and
at the month to year timescales, where the subsequent gravity
measurements are compared to indicate loss or gain of mass (or
water and ice) over that period. This paper demonstrates a
simple phase modulation scheme to directly measure laser
frequency change over long timescales by comparing an on-board
Ultra-Stable Oscillator (USO) clocked frequency reference to the
Free Spectral Range (FSR) of the on-board optical cavity. By
recording the fractional frequency variations the scale
correction factor may be computed for a laser locked to a known
longitudinal mode of the optical cavity. The experimental
results demonstrate a fractional absolute laser frequency
stability at the 10 ppb level (10{\ensuremath{-}}8) at time
scales greater than 10 000 seconds, likely sufficient for next
generation mission requirements.}",
doi = {10.1364/OE.434483},
adsurl = {https://ui.adsabs.harvard.edu/abs/2021OExpr..2926014R},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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