Hybrid fiber links for accurate optical frequency comparison

Lee, Won-Kyu; Stefani, Fabio; Bercy, A; Lopez, Olivier; Amy‐Klein, Anne; Pottie, Paul-Eric

doi:10.1007/s00340-017-6736-5

Cited by 29 publications

(25 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Optical frequency transfer with uncertainty as low as a few 10 −20 were reported with various experimental implementation [21,22]. For further improvement, the laser source as a dominant source of phase noise in the long-term was demonstrated experimentally [23]. When the laser source can be set in common mode, the biggest effect arises from the so-called interferometric noise [24].…”

Section: Introductionmentioning

confidence: 99%

Reciprocity of propagation in optical fiber links demonstrated to 10⁻²¹

Xu¹,

Delva²,

Lopez³

et al. 2019

Opt. Express

Self Cite

View full text Add to dashboard Cite

We present a study of the fundamental limit of fiber links using dedicated link architecture. We use an experimental arrangement that enables us to detect the forward and backward propagation noise independently and simultaneously in optical fiber and where the optical phase evolution is expected to be driven by the only contribution of the reference arms of the Michelson interferometer ensemble. In this article, we demonstrate indeed the high correlation between the optical phase evolution and the temperature variation of the interferometer ensemble, leading to a frequency offset of (4.4 ± 2.3) × 10 −21 . Using a simple temperature model and a Bayesian analysis to evaluate the model parameters, we show that the temperature effect can be compensated with post-processing, removing the frequency offset down to (0.5 ± 2.0) × 10 −21 . The residual slope of the optical phase evolution over 33 days is 350 yoctosecond/s. Using a global temperature parameter, we divide these 33 days dataset in four subsets and analyse their uncertainties. We show that they are self-consistent when the temperature is taken into account. This provides an alternative method to evaluate the accuracy of a fiber link, especially when the dataset includes large dead times. The result is finally interpreted as a test of the reciprocity of the propagation delay in an optical fiber. This unprecedented transfer capability could enable the comparisons of future optical clocks with expected performance at 10 −20 level and open new possibilities for stringent tests of special and general relativity.

show abstract

Section: Introductionmentioning

confidence: 99%

Reciprocity of propagation in optical fiber links demonstrated to 10⁻²¹

Xu¹,

Delva²,

Lopez³

et al. 2019

Opt. Express

Self Cite

View full text Add to dashboard Cite

show abstract

“…For installed buried fibers, the polarization variations couple more weakly to external environment, so we inspect little influence on polarization-sensitive systems deployed on field fibers. This gives the explanation for no obvious bump on the long-term stability with uni-directional two-way measurement deployed on the 43-km SYRTE-LPL link [30].…”

Section: Discussionmentioning

confidence: 86%

“…By using a partial Faraday mirror (p-FM) in Lab2 [30], the upper link (from A to E in Fig. 1) and lower link (from C to E) are connected.…”

Section: Methodsmentioning

confidence: 99%

Polarization Scramblers to Solve Practical Limitations of Frequency Transfer

Lopez²,

Amy‐Klein³

et al. 2021

J. Lightwave Technol.

Self Cite

View full text Add to dashboard Cite

Polarization variations in optical fibers are complex and would severely affect the performances of polarizationsensitive signal distribution systems. Owing to advances in experimental techniques and theoretical tools, we observe the effect of polarization variations in the optical fibers and we demonstrate that polarization mode dispersion (PMD) dominates the free-running fiber noise. Ultrahigh correlation, over 99%, is found between the phase fluctuation induced by polarization variation and the temperature fluctuation impacted on the optical fibers. By means of a polarization scrambling technique, the polarization variations in the optical fiber are averaged and the phase perturbations are minimized. It provides a promising solution for suppressing the random disturbances of polarization in the fiber-based optical frequency transfer system and quantum key distribution (QKD) system.

show abstract

“…Fig. 1 shows the experimental set-up and presents the method used to transfer the stability and SI-traceability of a remote NIR frequency reference located at LNE-SYRTE laboratory in Paris to a 10 µm QCL located at LPL laboratory in Villetaneuse (~10 km north of Paris) [38].…”

Section: Introductionmentioning

confidence: 99%

High-precision methanol spectroscopy with a widely tunable SI-traceable frequency-comb-based mid-infrared QCL

Santagata¹,

Tran²,

Argence³

et al. 2019

Optica

Self Cite

View full text Add to dashboard Cite

There is an increasing demand for precise molecular spectroscopy, in particular in the mid-infrared fingerprint window that hosts a considerable number of vibrational signatures, whether it be for modeling our atmosphere, interpreting astrophysical spectra or testing fundamental physics. We present a high-resolution mid-infrared spectrometer traceable to primary frequency standards. It combines a widely tunable ultra-narrow Quantum Cascade Laser (QCL), an optical frequency comb and a compact multipass cell. The QCL frequency is stabilized onto a comb controlled with a remote near-infrared ultra-stable laser, transferred through a fiber link. The resulting QCL frequency stability is below 10 -15 from 0.1 to 10s and its frequency uncertainty of 4×10 -14 is given by the remote frequency standards. Continuous tuning over ~400 MHz is reported. We use the apparatus to perform saturated absorption spectroscopy of methanol in the low-pressure multipass cell and demonstrate a statistical uncertainty at the kHz level on transition center frequencies, confirming its potential for driving the next generation technology required for precise spectroscopic measurements.

show abstract

Hybrid fiber links for accurate optical frequency comparison

Cited by 29 publications

References 32 publications

Reciprocity of propagation in optical fiber links demonstrated to 10⁻²¹

Reciprocity of propagation in optical fiber links demonstrated to 10⁻²¹

Polarization Scramblers to Solve Practical Limitations of Frequency Transfer

High-precision methanol spectroscopy with a widely tunable SI-traceable frequency-comb-based mid-infrared QCL

Contact Info

Product

Resources

About

Hybrid fiber links for accurate optical frequency comparison

Cited by 29 publications

References 32 publications

Reciprocity of propagation in optical fiber links demonstrated to 10−21

Reciprocity of propagation in optical fiber links demonstrated to 10−21

Polarization Scramblers to Solve Practical Limitations of Frequency Transfer

High-precision methanol spectroscopy with a widely tunable SI-traceable frequency-comb-based mid-infrared QCL

Contact Info

Product

Resources

About

Reciprocity of propagation in optical fiber links demonstrated to 10⁻²¹

Reciprocity of propagation in optical fiber links demonstrated to 10⁻²¹