Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)

Simultaneous spectral purity transfer at three optical clock transitions using an ultra-low noise Er:Fiber frequency comb

Michele Giunta, W. Hänsel, Marc Fischer, M. Lezius, Ronald Holzwarth

Published Jul 1, 2017• 4 citations
Publisher

Abstract

We have performed a multi-branch Er:fiber-based frequency comb comparison for simultaneously address the stability at different spectral regions. The optical beats are synchronously realized for three relevant wavelengths, corresponding to half the Sr, Yb and Hg lattice clock transition frequencies, showing an integrated phase noise below 55 mrad (1 Hz-1 MHz) and modified ADEV of ~6×10-18at 1 s, averaging below 1×10-18in <;20 s (Lambda-mode, 1 s gate time).

DOI
10.1109/fcs.2017.8089032

Related papers

Multi-arm Ultra-Low Noise Er:fiber Frequency Comb Comparison

Michele Giunta, W. Hänsel, M. L. Fischer +2 more

We have performed a multi-arm Er:fiber-based frequency comb comparison. The optical beat frequencies are simultaneously realized over 90 THz (from 192 to 282 THz) showing an integrated phase noise below 55 mrad (1 Hz-1 MHz) and an overlapping ADEV of 5×10−17 at 1 s, averaging below 1×10−18 at 100 s (PI-mode).

Conference on Lasers and Electro-Optics•Jan 1, 2017•1 citation

Sub-Hz Spectral Purity Transfer at the 10–18 level based on optical frequency comb

P. Zou, Michele Giunta, W. Hänsel +3 more

We report on a Er:fiber-based optical frequency comb transferring the stability of ultra-stable lasers from 194THz to 429THz. Sub-Hz level transfer to a fiber-delivered 698.44nm output port for future Strontium QPN-limited lattice clocks is demonstrated.

•Jan 1, 2018•0 citations

All-polarization-maintaining, single-port Er:fiber comb for high-stability comparison of optical lattice clocks

Noriaki Ohmae, Naoya Kuse, Martin E. Fermann +1 more

All-polarization-maintaining, single-port Er:fiber combs offer long-term robust operation as well as high stability. We have built two such combs and evaluated the transfer noise for linking optical clocks. A uniformly broadened spectrum over 135–285 THz with a high signal-to-noise ratio enables the optical frequency measurement of the subharmonics of strontium, ytterbium, and mercury optical lattice clocks with the fractional frequency-noise power spectral density of (1–2) × 10 −17 Hz −1/2 at 1 Hz. By applying a synchronous clock comparison, the comb enables clock ratio measurements with 10 −17 instability at 1 s, which is one order of magnitude smaller than the best instability of the frequency ratio of optical lattice clocks.

arXiv:1706.00174•Applied Physics Express•May 26, 2017•39 citations

Ultra Low Noise Er:fiber Frequency Comb Comparison

Michele Giunta, W. Hänsel, Katja Beha +3 more

We have optically compared two fiber-based frequency combs with ultra-high stability. The resulting beat frequency shows integrated phase noise below 100 mrad (100Hz to 2MHz) and an overlapping Allan deviation of 1×10−16 at 1s, dropping below 1×10−18 at 500s.

Conference on Lasers and Electro-Optics•Jan 1, 2016•9 citations

Sub-mHz Spectral Purity Transfer for Next Generation Strontium Optical Atomic Clocks

Michele Giunta, W. Hänsel, M. Lezius +2 more

We report on a Er:fiber-based optical frequency comb transferring the stability of ultra-stable lasers from 194THz to 429THz. Sub-mHz level transfer to a fiber-delivered 698.44nm output port for future Strontium QPN-limited lattice clocks is demonstrated.

Conference on Lasers and Electro-Optics•Jan 1, 2018•1 citation

Spectral purity transfer between optical wavelengths at the 10−18 level

Daniele Nicolodi, Bérengère Argence, Wei Zhang +3 more

We present an optical frequency comb-based scheme that transfers 4.5 × 10−16fractional frequency stability from a 1062 nm wavelength laser to a 1542 nm laser. We demonstrate that this scheme does not hinder the transfer down to 3 × 10−18at 1 s, one order of magnitude better than previous reported result. This exceeds, by more than one order of magnitude, the stability of any optical oscillator demonstrated to date, and satisfies the stability requirement for quantum projection noise-limited optical lattice clocks. We will finally describe our latest efforts to apply this technique for improving the performance the LNE-SYRTE Sr-based optical lattice clocks.

Conference on Precision Electromagnetic Measurements•Aug 1, 2014•0 citations
We have performed a multi-branch Er:fiber-based frequency comb comparison for simultaneously address the stability at different spectral regions. The optical beats are synchronously realized for three relevant wavelengths, corresponding to half the Sr, Yb and Hg lattice clock transition frequencies, showing an integrated phase noise below 55 mrad (1 Hz-1 MHz) and modified ADEV of ~6×10-18at 1 s, averaging below 1×10-18in <;20 s (Lambda-mode, 1 s gate time).
All-polarization-maintaining, single-port Er:fiber combs offer long-term robust operation as well as high stability. We have built two such combs and evaluated the transfer noise for linking optical clocks. A uniformly broadened spectrum over 135–285 THz with a high signal-to-noise ratio enables the optical frequency measurement of the subharmonics of strontium, ytterbium, and mercury optical lattice clocks with the fractional frequency-noise power spectral density of (1–2) × 10 −17 Hz −1/2 at 1 Hz. By applying a synchronous clock comparison, the comb enables clock ratio measurements with 10 −17 instability at 1 s, which is one order of magnitude smaller than the best instability of the frequency ratio of optical lattice clocks.
We present an optical frequency comb-based scheme that transfers 4.5 × 10−16fractional frequency stability from a 1062 nm wavelength laser to a 1542 nm laser. We demonstrate that this scheme does not hinder the transfer down to 3 × 10−18at 1 s, one order of magnitude better than previous reported result. This exceeds, by more than one order of magnitude, the stability of any optical oscillator demonstrated to date, and satisfies the stability requirement for quantum projection noise-limited optical lattice clocks. We will finally describe our latest efforts to apply this technique for improving the performance the LNE-SYRTE Sr-based optical lattice clocks.