Nonlinear spectroscopy of Sr atoms in an optical cavity for laser stabilization

Christensen, Bjarke T. R.; Henriksen, Martin R.; Schäffer, Stefan A.; Westergaard, Philip G.; Tieri, D. A.; Ye, Jun; Holland, Murray; Thomsen, J.

doi:10.1103/physreva.92.053820

Cited by 28 publications

(32 citation statements)

References 35 publications

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“…If we assume that the system is in a steady state the cavity locking condition dictates that the cavity is on resonance with the carrier frequency at all times, corresponding to that used in [28]. This gives us…”

Section: A Dispersion Signalmentioning

confidence: 99%

“…By increasing the finesse of the cavity with respect to the numbers reported in [28] we enable the system to move between a low-phase-shift regime and a high-phase-shift regime. Figure 2 shows typical dispersion scans where the theoretical model incorporating a cavity transfer function FIG.…”

Section: Theory Of Measurementmentioning

confidence: 99%

“…Very close to atomic resonance, the transfer function is proportional to sin(φ) ≈ φ for small phase shifts [28] and we can treat the transfer function as linear in phase. For a slightly larger frequency detuning, however, the existence of a maximal value for the transfer function results in some interesting behavior for a system with large total phase shift.…”

Section: B Transfer Function Propertiesmentioning

confidence: 99%

“…(see [28]) has been plotted using the known experimental parameters. The dispersion signal serves as an error signal for all values of the atom number N , but is distorted when detuned from resonance at higher values of N .…”

Section: Theory Of Measurementmentioning

confidence: 99%

“…One proof-of-principle approach to this is based on using the noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS) technique [24,25] for generating sub-Doppler dispersion signals [26]. This has shown promising results for laser stabilization that could be able to compete with traditional cavity-only stabilization techniques [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of bad-cavity-enhanced interaction with cold Sr atoms for laser stabilization

et al. 2017

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Hybrid systems of cold atoms and optical cavities are promising systems for increasing the stability of laser oscillators used in quantum metrology and atomic clocks. In this paper we map out the atom-cavity dynamics in such a system and demonstrate limitations as well as robustness of the approach. We investigate the phase response of an ensemble of cold 88 Sr atoms inside an optical cavity for use as an error signal in laser frequency stabilization. With this system we realize a regime where the high atomic phase shift limits the dynamical locking range. The limitation is caused by the cavity transfer function relating input field to output field. The cavity dynamics is shown to have only little influence on the prospects for laser stabilization, making the system robust towards cavity fluctuations and ideal for the improvement of future narrow linewidth lasers.

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Section: A Dispersion Signalmentioning

confidence: 99%

Section: Theory Of Measurementmentioning

confidence: 99%

Section: B Transfer Function Propertiesmentioning

confidence: 99%

Section: Theory Of Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamics of bad-cavity-enhanced interaction with cold Sr atoms for laser stabilization

et al. 2017

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The development of active optical clock

et al. 2023

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The atomic clocks, whether operating at optical or microwave region, can be divided into two categories according to their working mode, namely the passive clocks and active clocks. The passive clocks, whose standard frequency is locked to an ultra-narrow atomic spectral line, such as laser cooled Cs beam or lattice trapped Sr atoms, depend on the spontaneous emission line. On the contrary, the active clocks, in which the atoms are used as the gain medium, are based on the stimulated emission radiation, their spectrum can be directly used as the frequency standard. Up to now, the active hydrogen maser has been the most stable microwave atomic clocks. Also, the Sr superradiant active atomic clock is prospects for a millihertz-linewidth laser. Moreover, the optical clocks are expected to surpass the performance of microwave clocks both in stability and uncertainty, since their higher working frequency. The active optical clock has the potential to improve the stability of the best clocks by 2 orders of magnitude. In this work, we introduce the development of active optical clocks, and their types is classified according to the energy-level structure of atoms for stimulated radiation.

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Coupling atoms to cavities using narrow linewidth optical transitions: applications to frequency metrology

Norcia¹

2019

J. Phys. B: At. Mol. Opt. Phys.

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Narrow linewidth optical atomic transitions provide a valuable resource for frequency metrology, and form the basis of today's most precise and accurate clocks. Recent experiments have demonstrated that ensembles of atoms can be interfaced with the mode of an optical cavity using such transitions, and that atom-cavity interactions can dominate over decoherence processes even when the atomic transition that mediates the interactions is very weak. This scenario enables new opportunities for optical frequency metrology, including techniques for nondestructive readout and entanglement enhancement for optical lattice clocks, methods for cavity-enhanced laser frequency stabilization, and high-precision active optical frequency references based on superradiant emission. This tutorial provides a pedagogical description of the physics governing atom-cavity coupling with narrow linewidth optical transitions, and describes several examples of applications to optical frequency metrology.

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Nonlinear spectroscopy of Sr atoms in an optical cavity for laser stabilization

Cited by 28 publications

References 35 publications

Dynamics of bad-cavity-enhanced interaction with cold Sr atoms for laser stabilization

Dynamics of bad-cavity-enhanced interaction with cold Sr atoms for laser stabilization

The development of active optical clock

Coupling atoms to cavities using narrow linewidth optical transitions: applications to frequency metrology

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