Leibrandt, D.
, Thorpe, M.
, Chou, C.
, Fortier, T.
, Diddams, S.
and Rosenband, T.
(2013),
Absolute and relative stability of an optical frequency reference based on spectral hole burning in Eu<sup>3+</sup>:Y<sub>2</sub>SiO<sub>5</sub>, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=914300
(Accessed October 20, 2025)
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Absolute and relative stability of an optical frequency reference based on spectral hole burning in Eu3+:Y2SiO5
Published
Author(s)
, M Thorpe, , , ,
Abstract
We present four frequency comparison measurements designed to investigate the performance of an optical frequency reference based on spectral hole burning in Eu$3+:Y2SiO5. The first frequency comparison, between a single unperturbed spectral hole and a hydrogen maser, demonstrates a fractional frequency drift rate of 5 × 10-18/s. Optical frequency comparisons between a pattern of spectral holes, a Fabry-P\'erot cavity, and an Al+ optical clock show a short term stability of 1 × 10-15√τ that averages down to 2.5+1.1-0.5 × 10-16 at τ = 540~s. Finally, spectral hole patterns in two different Eu3+:Y2SiO5 crystals located in the same cryostat are compared yielding a short term stability of 7 × 10-16 √τ that averages down to 3.4+3.2-0.8 × 10-17 at τ = 410~s.Citation
Physical Review Letters
Volume
111
Pub Type
Journals
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Keywords
Hole burning spectroscopy, Metrological applications, optical frequency synthesizers for precision spectroscopy
Citation
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Created December 6, 2013, Updated February 19, 2017